ICHNEUMONID FINAL INSTAR LARVAE — SHORT 489 



some species of Hyposoter are listed in a different part of tlie key from 

 others. But the key is largely a compromise in that an attempt has 

 been made to fit the larval characters into a scheme of classification 

 based on adult characters. A revision of the tribe in the light of both 

 larval and adult characters would be the only satisfactory solution. 



Larval Key 



1. Setae on body approximately equal in length to blade of mandible. 



Prochas Walkley, new genus 2* 

 Setae on body much shorter than blade of mandible 2 



2. Mandible as in figure 50a with no marked diflferentiation between base and 



blade Pyracmon 



Mandible with blade more slender than base 3 



3. A lightly sclerotized plate is present lateral to each pleurostoma and hypo- 



stoma and extending dorsally to meet ventral half of antenna . Spudastica^* 

 A lightly sclerotized plate, if present, not of this shape 4 



4. A lightly sclerotized and lobed plate as in figure 54a present lateral to each 



pleurostoma and hypostoma and not extending dorsally to meet ventral 



half of antenna Phobocampe 



A lightly sclerotized plate of this shape not present 5 



5. A lightly sclerotized plate extends dorsally from pleurostoma across to meet 



ventrolateral edge of antenna Benjaminia 



A lightly sclerotized plate of this shape not present 6 



6. Prelabial sclerite roughly triangular in shape with ventral part poorly devel- 



oped 7 



Prelabial sclerite Y-shaped with ventral part as well developed as dorsal parts 



9 



7. Ventral part of prelabial sclerite extending to point just ventrad of labial 



palps Charops narangae (Cushman) 



Charops ganges Cushman 



Ventral part of prelabial sclerite not extending to point just ventrad of labial 



palps 8 



8. A lightly sclerotized plate present beneath ventral part of labial sclerite. 



Bathyplectes 

 A lightly sclerotized plate not present beneath ventral part of labial sclerite. 



Biolysia 



i* In order that Dr. Short may refer to this gonus by a valid name a brief description Is given here. R. A, 

 Cushman had set aside in the U.S. National Museum collection two black campopleglne specimens that 

 he had labelled as Prochas theclae, a manuscript name. 



Prochaa theclae, new genus, new species 



This new genus is closely related to Charopsimorpha Viereck, 1912 but may be easily distinguished from it 

 by the broader postpetiole, different abdominal sculpture, fully areolated propodeuin, and by unusual head 

 characters for this gi-oup of the Campoplcgini. The type species, Prochas theclae, has the occipital carina 

 meeting the hypostomal carina at the base of the mandible; has non-emarginate eyes (the Inner margin at 

 most only slightly sinuate); has the clypeus (pale in the male) protruding just before the apex and with the 

 apex slightly rounded, and mandibles with flange on only the basal half of lower margin. 



Holotype female (USNM 64687), Trinidad, B.W.I., Aug. 6, 1943, Diego Martin. AUotype male (USNM), 

 Trinidad, B.W.I., Nov. 14, 1941, Brasso. Both specimens were reared from Thecla empusa How. ou cacao 

 by E. McC. CaUan. 



Luella M. Walkley 

 Entomology Research Division 

 U.S. Department of Agriculture 

 » Of Bcirne (1941). 



