ICHNEUMONID FINAL INSTAR LARVAE — SHORT 491 



canescens (Gravenhorst), Casinaria eupitheciae Viereck (fig. 51b), 

 C. induhia (Morley), C. infesta (Cresson), C. tenuiventris (Graven- 

 horst), Casinaria sp., Charops gauges Cushman, C. narangae (Cush- 

 man) (fig. 52a), C. papilionis Ashmead (fig. 51c), Bathyplectes corvina 

 (Thomson), B. curculionis (Thomson) (fig. 52b), B. exiquus (Graven- 

 horst), Biolysia tristis (Gravenhorst) (fig. 52c), Campoletis oxylus 

 (Cresson) (fig. 53 a), Dusona glauca glauca (Norton), D. quehecensis 

 (Walley), D. terehrator (Foerster), D. variabilis (Franklin), D. vitti- 

 collis vitticollis (Norton) (fig. 53b), Nepiera benevola Gahan (fig. 53c), 

 Phobocampe disparis (Viereck) (fig. 54a), P. flavipes (Provancher), 

 Horogenes acutus (Viereck), H. aestivalis (Viereck), H. compressus 

 (Cresson), H. comptoniellae (Viereck) (fig. 54b), H. eureka (Ashmead), 

 H. obliteratus (Cresson), H. pterophorae (Ashmead), H. punctorius 

 (Roman), Horogenes sp., Hyposoter fugitivus fugitivus Say, H.fugitivus 

 pacificus Cushman, H. nigrolineatus (Viereck), H. parorgyiae (Viereck), 

 H. pilosulus (Provancher) (fig. 54c), H. rubiginosus Cushman, Olesi- 

 campe euurae (Ashmead), 0. pikonemae Walley (fig. 55a), 0. lophyri 

 (Riley) (fig. 55b), Holocremnus clandestinus (Holmgren) (fig. 55c), 

 H. ratzeburgi (Tschek), Benjaminiafuscipennis (Provancher) (fig. 56a), 

 B. euphydryadis (Viereck), Charopsimorpha tibialis (Cresson), C. 

 unicincta (Ashmead) (fig. 56b), Prochas theclae Walkley, new genus, 

 new species (fig. 56c) : 



Pyracmon has a distinctive form of mandible with a relatively broad 

 blade. Within the genus Campoplex, C. pyraustae Smith has a labial 

 sclerite which is more rounded than in the other species examined, 

 and in Campoplex sp. nr. inaegualipes Cresson the mandible has a 

 curved but broad blade with a width equal to that of half the depth 

 of the base. C. tosensis (Uchida) differs from the species figured in 

 that the prelabial sclerite meets the broad ventral part of the labial 

 sclerite. Idechthis canescens (Gravenhorst) is basically similar to the 

 species figured, but the enlargement on the lateral end of the stipital 

 sclerite is relatively smaller. The species of the genus Charops fall 

 into two groups: C. ganges Cushman being very like C. narangae 

 (Cushman) (fig. 52a), and C. obtusus Morley as figured by Beirne 

 (1941) being similar to C. narangae. Bathyplectes and Biolysia are 

 distinctive in the shape of the labial sclerite and in the triangular and 

 lightly sclerotized prelabial sclerite. Horogenes, Hyposoter, and 

 Olesicampe are basically similar. The labial sclerite is more rounded 

 than in figure 54b in Hyposoter fugitivus fugitivus Say and H.fugitivus 

 pacificus Cushman. Also, in these two subspecies the lightly sclero- 

 tized area between the base of the prelabial sclerite and the ventral 

 part of the labial sclerite is not present. The mandible of Hyposoter 

 has a small lobe dorsal to the blade. This is seen in a slight form in 

 other Campoplegini, but is more pronounced in Hyposoter, especially 



