198 PROCEEDINGS OF THE NATIONAL MUSEUM

so.im.

NORTH AMERICAN THYSANOPTERA—

HINDS.

199

Ihave pliicodthesino'lospecies iiKKiniifouoraJixin thisgenus, though

J do uot

know

the female, 'i'be characters of the fore femora and antenna? are sufficient to separate itgenerically

from

PJdceothrips.

ACANTHOTHRIPS MAGNAFEMORALIS,

newspecies.

PlateIX, tl^'s.9.'}, 94.

}r(d(\

— ^Length

^2.Itl

^mm.;

^{width ofmesothorax 0.42}

^mm.

^General

coloryellowish lirownwithuntennie, legs,andeighthand ninth

abdom-

inal segments banded with nearly transpai'entor yellowish white.

Head

nearlyone and one-fourth times aslong aswide; cheeks bulg- inga))ru]^tly andgreatlyl)ehind the eyes,then convergingto the neck, which isas wide as the diameter through the eyes; cheeks, especiallj'"

anteriorparts, setwith short spinesborne

upon

veryprominent tuber- cles; front between eyes ver}^ narrow, carinated. P^yes large, finely faceted, reniform above, inner edges parallel; ocelli small, approxi- mate, and placed between the middle of the eyes. Proboscis long, slender, pointed; labrum sharplypointed. Antenna^ scarcelytwiceas long as the head and ver^^ slender; relative lengths of segments as follows

:

10 12 29 26 23 15 15 9

Segments

one to five subequal ⁱⁿ thickness; three tofive similar in shape, elongated, urn-shaped; eight sharply conical. S(^gments one, two, seven, and eight quite uniformly dark brown; bases of three to fiveand tips of three and four pale yellowish, nearly white on ^three;

six entirely pale yellow, with slight brownish tinge on outer half;

antenna? appear annulated Avith paleyellow and dark brown. Spines and sense cones long, slender, and light colored; the cones onthree to five fullyone-third thelengthof segment threeand onsixabout three- fifths its length.

Prothorax a])out two-thirdsas long as head; width toouter angles of coxte nearly twice its length; transverse margin nearly straight;

the usual stout spines on thoraxand

abdomen,

except those at tip of tube,areextremely shortand blunt.

Mesothorax

slightly wider than the

abdomen;

middle of pterothorax concaved slightly.

Wings

long and rather slender.

Legs

moderately long; fore femora extremely thick and large, almost as wideas length of fore tibia?; fore femora

armed

with a stouttooth at the tip within; foretibijv bentoutwardat base; fore tarsi one segmented,

armed

with averystout tooth; middle and hind tibii« rather short and swollen in the middle, their tibiae quite slender and their tarsi

two

segmented.

Fore

femora j'^ellowish

brown; fore tibia? and tarsi pale yellowish, tibiti? alone shaded with

brown

on middle of outside; middle and hindfemora almost trans- parent white at base, outer half shaded with

brown

and having a

200 rROCEEDimiS of the national museum.

^vol.XXVI.

roundish, ^lio-ht vellowish spot on side of dark area; middle and hind

tibia' pah' veUowish at base and tip, banded with dark

brown

around thf inid(Ue, these ^tarsi pak^ yellow, lu-own at tips; surfaceof all legs rou^'h. })einu- thickly set with minute warts, each bearing a small spine.

Abdomen

a))outtwo-thirds the length of the Ixxly, tapering gradu- ally from second segmenttotip; width at second

segment

butslightly less than that of niesothorax.

Tube

slightly

more

than three-fourths as h)ng as head; diameter at middle of tu})e aboutone-sixth that at middle ofabdomen. Sidesofmetathorax and surface ofa))domen,

up

toabout ^the seyenth or eighth segment, peculiarly roughened with closely set small warts,

many

^of which bear small spines.

The

tube

isnearly cylindrical, without ascale at itsbase, andat the tipbears a circletof eight extremely long, slender, acutehairs, whichare nearly three timesas longas tu})e.

The

basal third of tu})e is yery paleyel- lowish white; the outer two-thirds ^is abruptly})rown-l)lack; segments eightand nine pale yellow; three to seyen appear irregularly striped with pale yellowand dark ])rown; dorsal stripe pale yellowand about the width of the wings; a subdorsal

row

of dark-brown, semicircular spots, whichstand one in themiddle on each side of these segments withthe straight side toward the dorsal line, giyes the appearance of a subdorsal stripe; then followson each sidean irregular, pale yellow stripe, and the middle of the sides of the segments is shaded with brown. Spinesonsidesof a))dominalsegments and thebackof eighth and ninth areextremely short andl)lunt.

Described

from

one specimen.

Female

unknown.

VooiJ plant.

—

%

II(ih!t((t.

—

Miami, Florida.

MALACOTHRIPS, new genus.

Head

plainly longer than wideand narrowed in front.

Cheeks

full

andwith spine-])earingwarts; yertexeleyated.

Antemuv

nearly twice aslong as head.

Mouth

cone as long as its breadth at base, reaching the hindedgeof the prosternum; labrumquitesharplypointedat tip.

Prothorax two-thirds as long as head. Pterothorax

somewhat

con- stricted in middle. Fore tarsi with a tiny tooth.

Wings

usually reduced to pads.

Abdomen

large and full in the female.

A

^closely

lying scaleat ))ase of tul)e in the male.

This geiuis contains only one species, Ccoitafiis.

{iKuXaKog, soft: ^pif.)

MALACOTHRIPS ZONATUS,

newspecies.

IMateIX, fifrs. 95-98.

Fri„ah:—\jox\aih !.<)!>

mm.

(1.50to l.OS nun.);widthofpterothorax

0.:>.() nun. ((>.L>T to {).?A nun.). (Jeneral coloi- pale bi-ight yellowon

N...1310.

NORTH AMERICAN THYSANOPTERA—

HINDS.

201

thorax and segments one, three, four, and five of the

abdomen;

head and other abdominal segments brown.

Body

apparently weaklj'^

chitinized.

Head

nearly one and one-third times as long- as wide, narrowedin front; cheeks moderatel^^ full and set with a

few

small spines borne

upon

small warts; head appears constricted closebehindthee^'es, and slightly so at neck; post-ocular bristles well developed: front of head between eyes developed into a prominence bearing theantennaj; ver- tex produced into asortof

hump,

which, however, does notoverreach the insertion of the antennte.

Eyes

small, finely faceted, darkpur- plish red, surrounded

by

pale yellow margins; ocelli present, subap- proximate,bornewellforward

upon

the

hump,

the front ocellus being

upon

its vertex; pigmentation around ocelli l)right red.

Mouth

^cone

moderatel}"longand slender;

labrum

aliruptly constrictedand sharply pointedat tip. Antennje approximate at base,almosttwiceaslongas head; relative lengths of segmentsas follows:

_1_

_§_ _A_ A^ _L

iL

A^ ^

9.8 13.5 18.1: 16.5 15.8 13.9 12.4 11.4

Basal segments large, truncate-conical, placed divergently; three clavate;

from

three to eightthesegments

become

gradually

more

nar- row.

Antenna

nearly uniformly brown, exceptthree, w^hich is yel- lowish brown; spines and sense cones quite long,but slenderandlight colored, soinconspicuous.

Prothorax abouttwo-thirdsas longas head and across outer angles of coxa3 about twice as wideas long. All the usual prominentpro- thoracic spines well developed, but light colored; hind margin not sharply defined. Pterothorax in iniddle slightly narrower thanwidth across fore coxaj; mesothorax short, slightly narrower than metatho- rax and slightly brownish yellow in color.

Wings

reduced to ver}^

small pads, each fore

pad

bearingthree quitelong,bluntspines.

Legs

of

medium

lengthand middle

and

hind pairs quite slender; forecoxee projecting considerably

beyond

thorax; fore femoraslightlythickened and tarsi

armed

with a small tooth. All legs pale yellow or pale

r)rownishyellow withprominent

brown

spot within tipof tarsus.

Abdomen

about one and two-fifths times as broad as metathorax, quite stout to eighth segment, then sides converging to l)ase of tu]>e.

Tube

a})outthree-fourthsaslongas head andone-third aswideatmid- dleas long; sides straight, tapering slightly; terminal spinesaboutas longas tube; spines on sides ofal)domen pale, ])utquiteprominent in

reducedlight.

Segment

one is concolorous with metathorax;threeto fiveare clear, bright yellow; two, six, seven, and eight are yellowish brown,darkeston sides; nineand tube are darkest brown.

Described

from

four females.

Coff/pe.—Cat. No. 6333,

U.S.N.M.