(1)148 PROCEEDINGS ENTOMOLOGICAL SOCIETY Perkins, Bui. 1, pt.

148 PROCEEDINGS

ENTOMOLOGICAL

SOCIETY

Perkins, Bui. 1, pt. 1, Exp. ^Sta. Hawaiian SugarPlanters' Associ- ation)^. Perhaps^theRhopalosomidae

and

the Dryinidaehad acom-

mon

_origin, asthe larvae would_indicate,

and

the adults have_spe-

cialized along ^{different lines} though retaining certain characters in

common.

It

may

^be interesting to

add

that the family Rhopalosomidte

is

now

represented

by

^four species, one ofwhich hasbeen _placed ina _genusofdoubtful_standing. Three _specieshave been_reported onlyfromthe Neotropicalregion,

and

one whichis

known

to occur in India

and

Ceylon from^the Oriental region.

The

Rhopalosonm poeyi Cresson

was

_originally described from

Cuba

but since has been _reported from _Jamaica;

San Domingo;

Hayti; ^{St. Louis,} Missouri; North _Carolina; St. Augustine, Florida; Louisville,

Kentucky;

and now

fromthe environsofWashington, D. ^{C. Lest}

some

marvel at thisremarkabledistributionit

may

^{beadded that}

great care

was

used in

making

the determination of

Mr.

Hood's specimen and unless there are characters which haveescaped both

Ashmead and

_myself this species has the wide distribution given above.

An

excellent _figure of this species ^is given on _plate 24 (figure 9) of Thesaurus

Entom.

Oxon. 1874.

NOTES ON THE FEEDING HABITS OF TWO ADULT SAWFLIES.

BY

S. A. RomVER, ^Bureau of Entomology.

The

feeding habits^ofadultsawfliesarevery incompletelyknown, although afew Europeanspecieshave beenobservedfeeding either on the _pollen of plants oron certain insects.

From

the literature

which has been _published on this subject ^{it is} a rather accepted opinion that the species ^of TenthredeUa and Tenthredo _{feed, in} the adult _stage, on other insects.

The

_following observations will

show

thatthis is not always the ^case.

As

far asI have been able to learntherecordsreferto feeding habits^of thefemale_only.

Do

the males feed?

TENTHREDELLA

LINEATA ₍

On

_{July 4, 1907,} I found a female of the _species devouring an adult Perlidwhichhas beendetermined

by

^Mr.

Banks

as All<>_{i>cr In} signata Banks.

The

adult sawfly was _sitting on the _foliage of

Heradeum

lanatum.

OF WASHINGTON,

VOLUME

_XV, 1913 149

TENTHREDO ARCUATUS

(Foerster).

On

_{August 8,} 1909, at Sonnenberg, Lucerne, Switzerland, ^I had the opportunity ^to

make

the _following observations

on

the_feeding habitsof an adultwhich_belonged to this species. This adult had only one antenna, but^asfarascould beobservedbehaved in a per- fectlynormal manner, and was so docile that it could be observed under a half inch lens. This female would fall, alighting heavily on theheadofoneofthe

common

Umbellifersand. due tothe

mo- mentum

ofthe _flight, would fall beneath the headof theUmbelli-

f'T. After recovering ^itself and righting ^itself on the _flower, it

would bite a stamen off near its base and fall beneath the crown

of flowers holding ^itself

downward by

^the four posterior legs. In this position ^it proceeded ^to devour an entire stamen, using the maxillary palpi, mandibles and labrum, but the ^labial palpi did not move. After the entire stamen had been devoured thesaw-

fly would _repeat the operation ^{until it} had _completelydevoured four stamens. After devouring ^four stamens ^it walked over the head of the flower and

by

^{use of the} palpi obtained the small drops ^ofliquid adhering^{to the} baseofthereceptacle. Aftervisit- ing ^all the flowers on the head, the ^insect took _flight.

To make

sure of the _species it

was

_captured before it had the opportunity to alight on another flower.

The

_species of Umbellifer

was

not determined.

In

commenting

^{on this} species in the Entomologist ^for Febru- ary, 1913, Morley ^{states that he has seen it chase flies}

and

has

known

ofone femalefound masticating a female

Empria

pcnnipes.

TWO ABNORMALLY DEVELOPED SAWFLIES.

BY S. A. ROHWER, ^Bureau ofEntomology.

Although ^{the sawflies often} have abnormal venation, ^itis very

>eldom that a _sawfly with abnormal

body

^{characters is ever col-}

lected.

As

far as I

am

able to learn only seven gynandromor- phic ^sawflies have been _{reported upon.} ^Inviewofthefact ofthe usual stability in the bodiesof sawfliesthe _followingnotes

may

^be

interesting.

XENAPATES

TERMINALIS (Say).

On May

13, 1911, along with other ^{sawflies collected at} East

Falls Church, _Virginia, an abnormal female of this species was

collected.

The

abnormality ^{occurs in the}

abdomen

which

dm-

not havethegonapophyses^{developedexcept slightly,}and the nates are abnormal.

The

cerci are normal as is the rest of the insect.

The

abnormal development ^{of the} eighth ventral and the entire