A ensif - Hindawi Publishing Corporationdownloads.hindawi.com/journals/psyche/1892/048157.pdfApril 89.J 259 emergefromtheearth solelybecausethe Hyphantria cocoonsare placed therein,

258 PS’CIfE, [April

EXPLANATION OF PLATE 7"Fig. I. Cluster of oenocytes from a

nearly mature Phryganeid larva.oenocytes l, large tracheal branch;smaller tracheal ramifications; h, tra-cheal hypodermis.

Fig. z. A nearly mature embryo of.X’iphidium ensiferum. oo, oenocyteclusters seen fi’om the surface throughthe integument; a, pleuropodium of theright side (appendage of the first ab-dominal segment); s, styli .(belongingto the ninth abdominal segment; thespecimen being a male) ;c, cerci.

Fig. 3. Part of a transverse sectionthrough the first abdominal segment of

a young embryo of tlalta (Phyllodro-mia) germanica, v, pleural ectoderm;o, oenocytes a, pleuropodium; i, coel-omic cavity; u, entoderm; w, nerve-cord e, fat-body b, blood-corpuscle;d, diverticulum of the coelomic wall,which in appendage-bearing segmentsbecomes converted into the limb-muscu-lature but in this segment atrophies.

Fig. 4" Part of a transverse sectionthrough one of the abdominal segmentsof a ]laslurus nymph; o, oenocytes;hh, hypodermal cells; r, chitinous cu-

ticle; ee, fat-body bb, blood-corpus-cles; m, tergo-sternal musclesmuscles in cross-section.

TACHINID PARASITE OF EUCATERVA VARIARIA GROTE, ANDOTHER NOTES.

BY C. H. TYLER TOWNSEND, LAS CRUCES, N. MEX.

Along the arroyos on the mesa-lands,and near the bases of mountain ranges,in southern New Mexico, may be foundgrowing large tree-like shrubs, withwillow-like leaves, and bearing in springnumbers of rather large pink flowers,which are followed by catalpa-like seed-pods. This is known to botanists as

Ckilopsis saligna.* In August theseshrubs are well stocked with the co-coons of a moth, 2ucalerva variariaGrote, the larvae of which feed uponthe leaves. The identification was madeby Dr. Henry Skinner, to whom I senta specimen of the moth. The cocoonsare very lightly spun of silk, binding

indebted to Professor E. O. Wooton, of theNew Mexico Agricultural College, for the

the leaves together to form a part ofthem, and are formed on the terminalshoots. From one of these cocoons,there issued, about the 4th or 5th ofSeptember, a o specimen of a Tachi-nid, which I can in no way distinguishfrom the o of I-tybhantrobhaga hy-phantriae Twns. The parasite issuedwithout going into earth, as there wasnone of the latter in the jar in whichthe cocoons were placed, but came

directly from the cocoon of the moth,in which, if I remember rightly, thepuparium of the Tachinid was found.This is quite a different habit fi’om thatpossessed by those members of the same

species which parasitize the Fall web-worm; perhaps the latter individuals

April 89.J 259

emerge from the earth solely because theHyphantria cocoons are placed therein,though I have found the puparlumseparate from the cocoon in the earth.Mr. Harrison G. Dyar, to whom I

sent one of the Eucaterva cocoons fromwhich the noth had emerged, wrote meas follows concerning two Tachinideggs which he found within it, andwhich are doubtless those of the abovespecies""There were two eggs of Tachina upon the

cast skin contained in the cocoon, and bothhad hatched but apparently had failed toenter the larva. Probably they are eggs ofthe species of Tachina you have bred fromthe cocoons. They are elliptic ovate in out-line, flat below and rounded above, smoothshining white. Under the microscope, theyappear very faintly divided into minute hex-agonal or circular areas. Length o.6 mm.,width o.3 mm."The larvae had hatched by breaking a

piece off of the pointed end. The eggs hadbeen placed upon the body of the caterpillar,not on the head."

Meigenia westeri Twns., Can.entom., xxiii, o6. This species was

recorded as bred from a chrysalis.Professor Webster sent me a portion ofthe chrysalis, and it has since beendetermined, by Dr. Henry Skinner, as

belonging to Pyrameis cardui. Re-

garding the generic position of this

Tachinid, it does not belong in Mei-

genia. The best place to which I can,with my present knowlege, relegate it,is in the genus Irospherysa v. d. W.Dr. Brauer, in a letter to me, has re-

ferred it with a query to Achaetoneura.Phorocera (3/[eigenia) promiscuaTwns. should perhaps be referred to

the same genus as the preceding. It is

indicated by Brauer in lilt. as belong-ing either to Achaetoneura or Proso-paea. If these genera can be used, it

will be well to recognize them.Tachina clisiocampae Twns. is re-

ferred by Brauer in lilt. to Eutachina.This I do not approve of, as there is no

necessity for the creation of the new

genus Eutachina to contain the forms

referred to Tachina sensu stricto.I would like also here to make a note

of the fact that Dr. Brauer informs me

by letter, as also in a note of his in the

Sitzungsber. k. k. zool.-bot, gesellsch.Wien, of May, t89I, that he first calledattention to the relationship of the Oes-tridae with the Muscidae in 1858, in the

Verh. zool.-bot, gesellsch. I wish,therefore, to correct my statement in

the Proc. ent. soc. Washn. ii, 9o, that

this view was first advanced by Loew.

THE LARVA OF SARROTHRIPA REVEYANA.

BY HARRISON G. DYAR YOSEMITE CAL.

The larva of this species occurredabundantly on poplar at Yosemite, Cal.,in July. The moths emerged the same

season in August and I obtained themat this time in i889 and I89I. WhenI first noticed the larvae living grega-

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A ensif - Hindawi Publishing Corporationdownloads.hindawi.com/journals/psyche/1892/048157.pdfApril 89.J 259 emergefromtheearth solelybecausethe Hyphantria cocoonsare placed therein,