258 



PSYCHE. 



[April 1S92. 



Explanation of Plate 7. 



Fig. 1. Cluster of oenocytes from a 

 nearly mature Phryganeid larva. o, 

 oenocytes ; /, large tracheal branch ; tt, 

 smaller tracheal ramifications; h, tra- 

 cheal hypodermis. 



Fig. 2. A nearly mature embryo of 

 Xiphidium ensiferum. 00, oenocyte 

 clusters seen from the surface through 

 the integument; a, pleuropodium of the 

 right side (appendage of the first ab- 

 dominal segment) ; s, styli (belonging 

 to the ninth abdominal segment ; the 

 specimen being a male) ; c, cerci. 



Fig. 3. Part of a transverse section 

 throusfh the first abdominal segment of 



a young embryo of Blatta ( Phyllodro- 

 mia) germanica. v, pleural ectoderm ; 

 o, oenocytes ; a, pleuropodium ; 1, coel- 

 omic cavity ; «, entoderm ; w, nerve- 

 cord ; e, fat-body; b, blood-corpuscle; 

 d, diverticulum of the coelomic wall, 

 which in appendage-bearing segments 

 becomes converted into the limb-muscu- 

 lature but in this segment atrophies. 



Fig. 4. Part of a transverse section 

 throusfh one of the abdominal segments 

 of a Blasturus nymph ; o, oenocytes ; 

 hh, hypodermal cells ; r, chitinous cu- 

 ticle ; ee, fat-body ; bb, blood-corpus- 

 cles ; w, tergo-sternal muscles; n, 

 muscles in cross-section. 



TACHINID PARASITE OF EUCATERVA VARIARIA GROTE, AND 



OTHER NOTES. 



Along the arroyos on the mesa-lands, 

 and near the bases of mountain ranges, 

 in southern New Mexico, may be found 

 growing large tree-like shrubs, with 

 willow-like leaves, and bearing in spring 

 numbers of rather large pink flowers, 

 which are followed by catalpa-like seed- 

 pods. This is known to botanists as 

 Chilopsis saligna* In August these 

 shrubs are well stocked with the co- 

 coons of a moth, Eucaterva variaria 

 Grote, the larvae of which feed upon 

 the leaves. The identification was made 

 by Dr. Henry Skinner, to whom I sent 

 a specimen of the moth. The cocoons 

 are very lightly spun of silk, binding 



* I am indebted to Professor E. O. Wooton, of the 

 New Mexico Agricultural College, for the name. 



TYLER TOWNSEND, LAS CRUCES, N. MEX. 



the leaves together to form a part of 

 them, and are formed on the terminal 

 shoots. From one of these cocoons, 

 there issued, about the 4th or 5th of 

 September, a $ specimen of a Tachi- 

 nid, which I can in no way distinguish 

 from the $ of Hyphantrophaga hy- 

 fihantriae Twns. The parasite issued 

 without going into earth, as there w r as 

 none of the latter in the jar in which 

 the cocoons were placed, but came 

 directly from the cocoon of the moth, 

 in which, if I remember rightly, the 

 puparium of the Tachinid was found. 

 This is quite a different habit from that 

 possessed by those members of the same 

 species which parasitize the Fall web- 

 worm ; perhaps the latter individuals 



