ICHNEUMONID FINAL INSTAR LARVAE — SHORT 411 



spur. X. cera (Cameron), X. enderleini Knieger, and X. stemmator 

 (Thunberg) (fig. 7a) have been examined. X. pedator (Thomson), 

 figured by Beirne (1941), differs from other species of the genus in 

 that the lateral parts of the labial sclerite are very broad; however, 

 the hypostomal spur and the stipital sclerite appear to be similar to 

 those of other species. X. citrina (Holmgren) is figured by Moutia 

 and Courtois (1952). 



Tribe Neoxoridini 



Figure 8a 



The only species of this tribe examined was Neoxorides horealis 

 (Cresson) (CD A) (fig. 8a). Members of this genus are parasites of 

 wood-boring Coleoptera. 



The dorsal part of the epistoma is unsclerotized but the pleurostoma 

 and hypostoma are well sclerotized; the hypostomal spur has a broad 

 dorsal part but narrows ventrally where it fuses with the narrow 

 stipital sclerite; the lateral end of the stipital sclerite is Y-shaped; the 

 ventral part of the labial sclerite is broad and pointed, although the 

 point appears as a separate cap on the remainder of the labial sclerite ; 

 the maxillary and labial palps each have two sensilla, one round and 

 one crescentic in shape; only the lateral parts of the labral sclerite are 

 well sclerotized; the mandible has a slender blade and a dorsal and 

 ventral row of small teeth, thus resembling the mandibles of the 

 Ephialtini, Rhyssini and Labenini; the antenna is papilliform; the 

 atrium of the spiracle is funnel-shaped and the closing apparatus is 

 close to the atrium; the skin has setae of moderate size but no spines. 



Tribe Rhyssini 



Figure 8b 



Species of this tribe parasitize wood-boring Coleoptera and sawflies. 

 The only specimen examined was Rhyssa sp. (fig. 8b). 



The dorsal part of the epistoma is not sclerotized and the pleuro- 

 stoma is lightly sclerotized; the hypostoma and hypostomal spur are 

 well sclerotized and the hypostomal spur is broad at its dorsal end; 

 the stipital sclerite is well sclerotized and is broad at its lateral end; 

 the labial sclerite is sharply pointed ventrally; the maxillary and 

 labial palps each have two sensilla, one round and one crescentic; the 

 dorsal part of the labral sclerite is not sclerotized; the mandible has a 

 slender blade with a dorsal and ventral row of small teeth; there is a 

 small, lightly sclerotized plate on the clypeus; the antenna is papil- 

 liform; the atrium of the spiracle is funnel-shaped and the closing 

 apparatus, which has relatively thick walls, adjoins the atrium; the 

 skin has setae of moderate size but no spines. 



Rhyssa sp. is figured by Beirne (1941). 



