324 APPENDIX. 



ing near the head ; ivings hyaline; nervures fuscous; stig- 

 mata rather large, triangular, fuscous, dull white at the an- 

 terior and posterior tips, and also on the costal edge ; ter- 

 guni paler, disk of the first segment blackish. 



Length less than one-fifth of an inch. 



This insect is one of the many species that deposit their 

 eggs in great numbers in the larva of Lepidopterous in- 

 sects. In a dead and dried larva, which I found adhering 

 to a tree, were the follicles of forty or fifty individuals of 

 this species. It varies somewhat in the quantity of the 

 black colouring with which it is marked. In some speci- 

 mens this extends not only along the pectus, but is conti- 

 nued in a capillary line along the edge of the thorax, the 

 metathorax also is entirely black, the tergum is black- 

 ish at tip and on the sides, the pectus has a black spot in 

 the middle, and the hypostoma has a transverse, blackish 

 spot. 



STEPHANUS, Jur. 



S. rufipes. Black ; abdomen sessile ; thorax not remark- 

 ably attenuated before. 



Inhabits Pennsylvania. 



Body somewhat sericeous ; palpi pale yellowish ; scutel 

 with a groove on each side, rough ; metathorax rough, 

 and with two slightly elevated, longitudinal, distant lines ; 

 wings hyaline ; a large, triangular, fuscous, carpal spot ; feet 

 rufous ; posterior pair of tarsi dusky ; abdomen a little 

 rough at base ; oviduct as long as the abdomen. 



Length one-fifth of an inch. 



Although the arrangement of the wing nervures agrees 

 precisely with S. coronatus, Jur., yet the form of the body 

 difiers materially, the thorax not exhibiting the remark 



