344 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Amblyteles Wesmael. 

 Ichneumon Authors, not Linnaeus. 

 In the writer's opinion Pterocormus* should rank as a sub- 

 genus of Amblyteles, which is one of the largest of genera. It is 

 probably one of the most useful groups of insects on account of 

 the habit of some of its species of parasitizing, and thus destroy- 

 ing, injurious insects. 



Key to Species. 

 Females. 



1. Species of Pterocormus 2 



Species of Amblyteles in the strict sense ; propodeum without 



lateral spines 55 



2. Abdomen, at least above, mostly black or blue, without pale 



bands or spots, except in some species or individuals, 

 which have apex of first or last dorsal segment pale-banded • 



or spotted 3 



Abdomen not colored as in preceding paragraph 25 



3. Hind legs entirely or nearly entirely black, their tibia im- 



maculate 4 



Hind legs not colored as in preceding paragraph 19 



4. Hind coxse with a densely hairy area beneath S 



Hind coxae without a densely hairy area beneath 11 



5. Apex of abdomen immaculate 6 



Apex of abdomen with one or more white spots; hind tro- 

 chanters white. Length 9.5-12 mm extrematatis 



6. Wings fuliginous 7 



Wings hyaline; scutel white and black 10 



7. Hairy area of under side of hind coxae condensed, like vel- 



vet 8 



Hairy area of under side of hind coxae not condensed 9 



8. Postpetiole scabrous. Length 12.5-14 mm cincticomis 



Postpetiole punctate above; hairy area of under side of hind 



coxae brown and equal in extent to apical end of pedicel 

 in this species; length 14 mm.; mostly black; eighth to 

 sixteenth joints inclusive partly yellow; pear-shaped welts 

 along superior margin of mesopleurae and disk of scutel, 

 yellow nigratoricolor 



9. Postpetiole finely scratched above. Length 16 mm ...germanus 

 Postpetiole punctate above. Length 14-16 mm viola 



10. Abdomen, at least above, steel-blue. Length 11-17 mm. caeruleus 

 Abdomen, at least above, black, tinged with blue; length 

 16 mm.; more than half of margins of face and cheeks, 

 bordering on eyes, luteous; mandibles and palpi immac- 



• Pterocormus Foerster in the strict sense supplants Ichneumon Authors, not Linnaeus. 



