LARVAE OF APHODIINAE — JERATH 75

dorsoepicranial setae

and two

microsensillae

on

each side. Frontal sutures ^distinct.

Clypeus

distinctly divided into smaller preclypeus

and

largepostclypeus,

Epipharynx

with

protophoba

bistichous

on

left

and monostichous on

right;

protophoba

with 16-18 microsensillae;

mesophoba

poly- stichous. Crepide flask-shaped; epitorma asymmetrical, flattened apically

and

bent

towards

laeophoba.

Mandibles

yellowish

brown

with ^scissorial

and molar

area

dark brown. Each mandible

dorsallywitha singleseta,ventrally

without

setae.

Maxillary stridulatory area with

an

irregular

row

of 12-15 teeth pointing cephalad.

Galea

ventrally with a long seta

and

a

row

of fourorfiveshortsetae.

Abdominal segments

^{1-6 each with three dorsal annulets; each} annulet with a transverse

row

^of setae except the last annulet of

segment

6.

On

the annulets of

segments

1-5 each

prescutum

with six short setae, each

scutum

with three long setae

and

three short setae

on

each side,

and

each scutellum with ¹⁰ short setae. Seg-

ments

7

and

8broad, each

segment

with

two

dorsalannulets

and

each annulet with a transverse

row

of setae.

Segments

9

and

10narrow, each with

two

transverse

rows

of closely placed setae

but

dorsa not divided.

Raster with teges of

40-45 hamate

setae scattered irregularly

on

the venterof 10th

abdominal

segment, four orfivelong slendersetae

on

each side.

Lower

anal lobe divided into

two

sublobes placed laterally.

Ataeniusstrigicauda Bates Figure 81

Material examined:

Six third-stage larvae

and two

second-stage larvae rearedin originalsoil

Aug.

26to Sept. 29, 1945,

by

O.L.Cart- wright

(USNM).

Description: Maximum width

of

head

capsuleof third-stagelarva 1.32-1.38

mm. Cranium hght

yellow, surface

smooth. Three

dorsoepicranial setae

and two

microsensillae

on

each side. Frontal sutures distinct.

Clypeus

distinctly dividedinto smafler preclypeus

and

largepostclypeus.

Epipharynx

withclithraenlargedmesally.

Protophoba

bistichous

on

left

and monostichous on

^right,with 16-18 microsensiflae;

meso- phoba monostichous

in the

middle and

polystichous

on

the sides.

Crepide

smaU and

subcu'cular;

epitorma

asjnnmetrical

and

flattened apically.

76 PROCEEDINGS OF THE NATIONAL MUSEUM

^vol.

m

Mandibles

yellowish

brown

with scissorial

and molar

area reddish

brown. Each mandible

dorsallywith

two

setae, ventrally with

two

setae, brustia well developed

on

left

mandible but

not so

on

right mandible.

Maxillarystridiilatory area with

an

irregular

row

of 13-16 conical teethfacingcephalad; smalltoothlike

markings

behind the

plectrum and on

cardo.

Galea

ventrally with a long seta

and

a

row

of five shortsetae.

Abdominal segments

^1-6 each with three dorsal annulets; each annulet with a transverse

row

of setae except the last annulet of

segment

6.

On

the annulets of

segments

1-5 each

prescutum

with sixshortsetae,each

scutum

with four longsetae

and

threeshortsetae

on

eachside,

and

each scutellum with10shortsetae.

Segments

7

and

8 broad, each

segment

with

two

dorsalannulets

and

each annulet with a transverse

row

of setae.

Segments

9

and

10narrow,each with

two

transverse

rows

ofcloselyplacedsetae

but

dorsa notdivided.

Raster with teges of 50-56

hamate

setaescattered irregularly

on

the venter of 10th

abdominal

segment, three or four long setae

on

eitherside.

Lower

anal lobe divided into

two

sublobes placed close to eachother.

Ataeniusbrevis Fall

Material examined: One

third-stage larva, associatedwithadults, collected at River Falls, S.C.

Aug.

27, 1942,

by

O. L.

Cartwright (USNM).

Description: Maximum width

of

head

capsuleof third-stagelarva 1.09

mm. Cranium

yellowish

brown,

surface smooth. Five dorso- epicranial setae

and two

microsensillae

on

each side. Frontal sutures distinct.

Clypeus

distinctly divided into smaller preclypeus

and

largepostclypeus.

Epipharynx

with

protophoba

bistichous

on

left

and monostichous on

right;

protophoba

with15 microsensillae;

mesophoba monostichous

inthe

middle and

polystichous

on

thesides. Crepide small

and

semi- circula,r;

epitorma

asymmetrical,flattened, bilobedapically

and

bent

towards

laeophoba.

Mandibles

yellowish

brown

with scissorial

and molar

area

dark brown. Each mandible

dorsally with a single seta, ventrally with

two

setae. Brustia poorly developed

on

rightmandible.

Maxillary stridulatory area with

an

irregular

row

of 9-11 blunt teeth facingcephalad; small toothlike

marking

behind the

plectrum and on

cardo.

Galea

ventrally with a long seta

and

a

row

of four shortsetae.

Abdominal segments

^1-6 each with three dorsal annulets; each annulet with a transverse

row

of setae except the last annulet of

LARVAE OF APHODIINAE — ^JERATH 77 segment

6.

On

the annulets of

segments

1-5 each

prescutum

with six short setae, each

scutum

with four long setae

and

three short setae

on

eachside,

and

each scutellum with 10 shortsetae.

Segments

7

and

8 broad, each

segment

with

two

dorsal annulets

and

each an- nulet with a transverse

row

of setae.

Segments

9

and

10 narrow, eachwith

two

dorsal

rows

of closelyplacedsetae

but

dorsa notdivided.

Raster with teges of40

hamate

setae scatteredii-regularly

on

the venterof10th

abdominal

segment, fourorfivelongsetae

on

eachside.

Lower

anal lobe dividedinto

two

sublobes placedclose toeachother.

Ataeniusschwarzi(Linell)

Material examined: One

third-stage larva reared, killed in hot water,

and

preserved in alcoholOct. 16, 1944,

by

O. L. Cartwright

(USNM).

Maximum width

of

head

capsule of third-stage larva 1.09

mm.

Cranium

lightyellow, surface

smooth. Four

orfive dorsoepicranial setae

on

each side. Frontal sutures distinct.

Clypeus

distinctly dividedintoa smaller preclypeus

and

largepostclypeus.

Epipharynx

with

protophoba

bistichous

on

left

and monostichous on

right;

protophoba

with15microsensillae;

mesophoba

polystichous.

Crepide small

and

subcu-cular; epitorma

asymmetrical and

flattened apically.

Mandibles brownish

yellow with scissorial

and molar

area

dark

brown.

Each mandible

dorsallywith

two

setae, ventrallywith

two

setae. Brustia welldeveloped

on

both mandibles.

Maxillary stridulatory area with

an

irregular

row

of 21-23 blunt teethfacing cephalad.

Galea

ventrally with a long seta

and

a

row

offiveshortsetae.

Abdominal segments

1-6 each with three dorsal annulets; each annulet with a transverse

row

of setae except the last annulet of

segment

6.

On

the annulets of

segments

1-5 each

prescutum

with sLxshortsetae,each

scutum

withthreelongsetae

and

four shortsetae

on

eachside,

and

each scutellum with10shortsetae.

Segments

7

and

8 broad, each

segment

with

two

dorsal annulets

and

each annulet with a transverse

row

of setae.

Segments

9

and

10 narrow, each with

two

transv^erse

rows

of closelyplacedsetae

but

dorsa notdivided.

Raster with teges of 54

hamate

setaecurved at their distal ends,

two

or threelong slender setae

on

each side.

Lower

anal lobe divided into

two

adjacent sublobes.

Ataenius erratusFsdl

Material examined: One

third-stage larva

and

11 second-stage larvae reared in soil,

cow manure, and dry

cereal Sept. 3, 1942, atClemson,

S.C, by

O. L.Cartwright

(USNM); two

third-stage

and

505622—59 4

78 PROCEEDINGS OF THE NATIONAL MUSEUM

^vol.in sixsecond-stage larvae reared in

cow dung and sand Nov.

18, 1942,

by

O. L. Cartwright

(USNM).

Description: Maximum width

of

head

capsule of third-stage larva 1.32-1.35

mm. Cranium

yellowish, surface smooth.

Three

dorsoepicranial setae

and two

microsensillae

on

each side. Frontal sutures distinct.

Clypeus

not

marked

into preclypeus

and

post- clypeus.

Epipharynx

with

protophoba

tristichous

on

left

and monostichous on

right;

protophoba

with 17-19 microsensillae;

mesophoba

poly- stichous. Crepide small

and

subcircular;

epitorma

asymmetrical, flattened,bilobedapically

and

bent

towards

laeophoba.

Mandibles

light yellowish

brown

with scissorial

and molar

area

dark brown. Each mandible

dorsallywith

two

setae,ventrally with one seta. Brustia poorly developed

on

right mandible.

Maxillarystridulatory areawith

an

irregular

row

of

24-28

conical teethfacingcephalad; small toothlike

markings behind

the

plectrum and on

cardo.

Galea

ventrally with a longseta

and

a

row

of four orfiveshortsetae.

Abdominal segments

^1-8 each with three dorsal annulets; each annulet

with

a transverse

row

of setae except the last annulet of

segments

6-8.

On

the annulets of

segments

1-5, each

prescutum

with six short setae, each

scutum

with three long setae

and

three short setae

on

each side,

and

each scutellum with 10 short setae.

Segments

7

and

8 broad,9

and

10narrow, eachwith

two

transverse

rows

of closelyplaced setae

but

dorsanot divided.

Raster withteges of

44-50 hamate

setaecurvedat their distalends;

two

or threelong

and

slender setae

on

each side.

Lower

anal lobe dividedinto

two

sublobesplaced

remote from

eachother.

Ataeniusimbricatus (Melsheimer)

Material examined: Twelve

third-stage larvae reared Apr. 28 to

June

2, 1944, at

Clemson,

S.C.,

by

O. L. Cartwright

(USNM).

Description: Maximum width

of

head

capsule of third-stage larva 1.02-1.12

mm. Cranium

light yellow, surface

smooth

except for

two

depressions

on

eachside

on

thefrons.

Three

dorsoepicranial setae

and two

microsensillae

on

each side. Frontal suturesdistinct.

Clypeus

not

marked

into preclypeus

and

postclypeus.

Epipharynx

with

protophoba

bistichous

on

left

and monostichous on

right;

protophoba

with 13-15 microsensillae;

mesophoba mono-

stichous inthemiddle

and

polystichous

on

thesides. Crepide small

and

subcircular; epitorma asymmetrical, flattened apically

and

bent towards laeophoba.

Mandibles

light yellowish

brown

with scissorial

and molar

area reddish

brown. Each mandible

dorsally with

two

setae, ventrally

LARVAE OF APHODIINAE — ^JERATH 79