ICHNEUMONID FINAL INSTAR LARVAE^ — SHORT 463 



3. Dorsal ends of labial sclerite broad Asphragis 



Dorsal ends of labial sclerite narrow Leptobatopsis 



4. Hypostoma not extending laterally beyond hypostomal spur . Lampronota 

 Hypostoma with short lateral bar beyond hypostomal spur . Pimplopterus 



The species of Lampronota figured is peculiar in that there is a 

 lightly sclerotized band running along the ventral edge of the labrum. 

 This band is distinct from the band connecting the posterior pleuro- 

 stomal processes across the dorsal surface of the food meatus in some 

 genera. The functions of these bands are not obvious. Beirne (1941) 

 does not figure a labral band in L. catenator (Panzer) although he does 

 figm^e a band between the posterior pleurostomal processes. 



The following were examined : Lampronota sp. nr. sesiovora (Rohwer) 

 (fig. 38b), Leptobatopsis sp. nr. lepidus (Cameron) (fig. 38c), Lissonota 

 brunnea (Cresson) (fig. 39a), Pimplopterus rubricus (Cresson) (fig. 

 39b), Asphragis mirabilis (Cresson) (fig. 39c). 



Lampronota catenator (Panzer) and Syzeuctus maculatorius (Fab- 

 ricius) are figured by Beirne (1941). S. maculatorius is similar to 

 Asphragis although teeth do not appear to be present on the mandible. 



Tribe Banchini 



Figure 40 



Larval Key 



1. Epistoma present Exetastes 



Epistoma absent 2 



2. Ventral part of prelabial sclerite more lightly sclerotized than dorsal parts. 



Ceratogastra 

 Ventral part of prelabial sclerite as well sclerotized as laterial parts . Banchus 



Banchus and Ceratogastra are very similar. The T-shaped prelabial 

 sclerite resembles that of many Ophioninae. Exetastes differs from 

 other Lissonotinae in having a complete epistoma, but the remaining 

 characters, such as the shape of the mandible, are typical of the sub- 

 family. Apart from the epistoma, Exetastes differs from the other two 

 genera of the Banchini examined in that there are teeth on the man- 

 dibles. However, the structure of the spiracle is basically similar in 

 the three genera, the closing apparatus being as long as two or three 

 times the depth of the atrium. In the Lissonotini the closing apparatus 

 is approximately of the same length as the atrium. 



The following were examined: Exetastes bijenestratus Cushman 

 (fig. 40a), E. illinoiensis (Walsh), Ceratogastra ornata ornata (Say) 

 (fig. 40b), Banchus femoralis Thomson (fig. 40c), B.fiavescens Cresson. 



The following are figured in the literature: Exetastes cinctipes 

 (Ratzeburg) (Beirne, 1941), Exetastes sp. (Snodgrass, 1935), Banchus 

 femoralis Thomson (Beirne, 1941). 



