Note on the <I>Cedrela</I> Psyllids (genus <I>Freysuila</I> Aleman)

OF WASHINGTON. 195

this species

was

simply an ordinary cosmopolite and

showed

that a

number

of other mites

which

he_especially mentioned are also practically cosmopolitan.

Mr. Howard

called attention to the fact that this clover mite is peculiarly adapted ^{to a}

commercial

distribution. It

may ^and

probably has been ^carried commercially

on

nursery stock ^all overthe world, while

from

the habits of the adults in crawling great distances ⁱⁿ search of hibernatingquar ters it

may

^{be carried}

^on

anything

coming from

^the household, oreven

upon

^{the bodies} of animals.

Mr.

Marlatt said that the occurrence ofthis insect

upon

^{cultivatedtrees}

and

in households

had

onlyrecently been recognized,

and

thatits

wide

distribution

was

_probably of very early occurrence.

Mr. Schwarz

stated that theoccurrenceofthis Bryobia

on

_very high mountains^isvery^re markable.

Mr. Hubbard and

himself have found itduring ^the

month

of

June

^{in the}

Wasatch Mountains

of Utah, ^at aneleva tionof from _10,000 to 1 1,000 ^feet.

The

eggs occurred ⁱⁿ such quantities under stones

between

the

snow

fields that they could be scraped

up by

quarts.

The

next paper,

which was

_presented

_by Mr. Schwarz, was

entitled:

NOTE ON THE CEDRELA PSYLLIDS (GENUS FREYSUILA ALEMAN).

By

^E.

^{A. SCHWARZ.}

Many

years ago, the ^late Dr.

Eugene Duges,

^of Guanajuato,

Mex.,

^{sent to the lamented Dr. C.}

V.

_Riley

some

_{badly pre} servedspecimens ^{of a}remarkable _Psyllid, withthestatement that this insect

was

greatly injurious ^to Cedrela trees.*

They ^were

then consideredasbelonging^toan undescribed genus

and

_species.

What

_appearsto bethe

same

_species

was

sent

some

_yearslaterby Dr.

A.

_Ernst,

from

Caracas, Venezuela, and by

Mr.

F.

W.

Urich, from ^{the island of} Trinidad,

W.

I., the species being ⁱⁿ eithercase

marked

as being injurious ^to Cedrela trees. Finally, in 1896, Dr. Alfred

Duges,

^of Guanajuato,

Mex.,

forwarded ad ditional specimens ^to Dr. L.

O. Howard,

^withthestatement that thisPsyllid

had

beendescribedby Dr.J.

Aleman,

^underthe

name

of

Frey-Suila

dugesii.

* Cedrelabelongs^tothe familySterculiaceae.

The

woodofC. odorata (andperhaps ^{alsoof other}speciesof thesame_genus)has oflateyears ac quired considerableeconomicimportance,and it isstated that ^itisnever attackedby anyinsect, noteventhetermites,

196 ENTOMOLOGICAL SOCIETY

Dr.

Aleman's

account

and

descriptions extend over several pages ⁱⁿ

La Naturaleza,

^{but are far from} being satisfactory.

In his descriptions he _gives only ^characters

common

to all Psyllids, but thegenus ^is recognizable

from

therough figures.

I giveherewith a

more

detailed description of ^thisremarkable genus, ^for

which

the

name

_proposed

_by Aleman

has to be re tainedwith _{a slight} change.

GENUS FREYSUILA ALEMAN.

Frey-Suila Aleman, La^Naturaleza(2)i,No._i,1887, pp. 21-26, tab.^III.

Body^{robust. Vertex}transverse, broadly excavated longitudinallyalong themedian line,^itsfrontmargin triangularly notchedat middle, greatly elevatedand obliquely truncate on each sideof the excision; eyeslarge, prominent, ^thetempora ^welldeveloped behind them;^{anteriorocellus not} visiblefrom above; frontalprocesses absentandrepresentedontheunder sideof thehead by^aprotuberanceoneachsidebeneaththe antennal base and infrontof the_largeknob-shaped clypeus. Antennaeunusuallj' long;

firsttwo_jointsshortandthickas usual, third jointextremelylong,

much

wider than the followingjoints, densely asperateand densely pubescent, slightlytaperingat apical portion,joints 4andthe following very^thinand slender.

Pronotum and dorsulum _greatly ascending posteriorly, the former slightly emarginate behind, ^lateral impressions shallow andconfluent;

dorsulumtransverse,anteriormarginhardly^lessconvexthan the posterior margin.

Elytra hyaline, membranaceous, elongate-oval, gentlywidening from baseto apical third,apex broadlyand _regularlyrounded: cubitusas long

as,or _slightlyshorter than,^discoidal part of subcosta^{; a distinct} ptero- stigma,stemof second fork not _parallel with radius; tipofwing^{at the} termination of the 4th^furcalorclose toitwithin thesecond marginal^cell;

legs extremely long and ^{slender, tibiae}not dentate at base, ^tarsinormal_; genital plateofmale without lateralappendage, genitalsegment^offemale short.

The

_genusis readily

known _by

the form of the antennae and the very longlegs.

The

front

margin

^{of thehead} recalls thatof

Homotoma

(Psyllinae) and Rhinopsylla (Triozinas), but in both of these genera ^{thevertex is}

more

or less flattened. Freysuila ^is difficult to place ⁱⁿ Dr. Fr.

Loew's

arrangementof the subfamilies of_Psyllidae, but if

we

_adopt his system ^the genus can only be placed

among

the Aphalarinae.

However,

^this subfamily ^isvery badly ^defined, and iseithernot separablefrom the_Psyllinae,oran entirely

new

arrangement ^{of the}genera ^{has to} take place.

At

any^{rate the} genus^differsfrom allgeneraplaced

among

^the

Apha

larinae

by

the great length and slenderness of the antennae and the remarkable

development

^{of thethird antennal}joint.

OF WASHINGTON. 197 The

type of the genus ^is

F.

_dugesii

Ale man

described

from

Guanajuato,

Mexico

;

two

other forms,

which

areeitherstrongly

marked

varieties,orclosely alliedspecies,are

known

from_Caracas, Venezuela, and Trinidad,

West

Indies.

These

three forms

may

bedistinguished ^asfollows:

Thirdantennal joint^atmosttwice the length of thefourth,either_entirely ochreousor_paleonly^atbase. Headand thoraxwithoutdefinite black markings.

Third antennal_jointalmost twice aslong ^as the fourth; fore-wings narrower, morenarrowly rounded ^at apex; ^{fourth furcal} running intothe_tipof the wing(Guanajuato, Mex.) dugesiiAleman.

Third antennal joint only one-third longer than the fourth^{; fore-} wingswider, broadly rounded at apex; tip ofwing within the 2d marginal ^cell(Caracas,Venezuela) ^var.ernstiiSchwarz.

Thirdantennaljoint at leasttwo andone-half times longer than the^fourth.

Headandthoraxwithwelldefinedblackmarkings; fore-wings broadly roundedatapex: ^fourthfurcal running ^{into the} tipof thewing; ^third antennal_jointblack (Trinidad, West_Indies) var. cedrelceSchwarz.

In discussing^this paper

Mr. Ashmead

stated thatthe very ^re

markable

antennasof Freysuila,

which

resembled in fact those of the saw-fly genus Xyela,

would

warrant the erection

by Mr.

Schwarz

of at leasta

new

tribe.

Some

discussion ensued

between

Messrs. Gill,

Ashmead, and Schwarz

as to the advisabilityof forcing ^a

form

like this intothe dichotomous table in preference^to putting^it aside

and

_forminga

new

_group.

The

discussion took a general ^turn,

and

Messrs.

Gill

and Ashmead

favored the last

view and Mr. Schwarz

the former.

JUNE

^17, 1897.

PresidentMarlattinthe chair

and

Messrs.Gill,Benton, Motter, Pratt, Waite, Chittenden,

Ashmead, Schwarz,

Patten,

Howard, Heidemann, Fernow,

Hine,

and

Matthis also present.

Mr. Schwarz

exhibitedspecimens^{of a}probable

new

_{species of}

thegenus Telegeusis

Horn

_{(familyDrilida?)},collected

by Mr. Hub-

bard at the

Hot

Springs (southwestern ^{foot of} Galiuro Mts.), Arizona,

and

_spoke ^at

some

length of the remarkable_palpi pos sessed by ^this genus.

Mr. Ashmead

asked

why

^the palpi ⁱⁿ certain genera ⁱⁿ

many

groups ^{are so} prolonged.

He

noted a