No. 22.~\ HYMENOPTERA OF CONNECTICUT. 43 



16. Antennae with six segments; front wings with three anal 



veins fused into a single vein Acordulecerin;e p. 165 



Antennae with three segments; front wings with three anal 



veins never fused into a single vein 17 



17. Front wings with free part of Sci present Hylotominje p. 160 



Front wings with free part of Sci wanting ScHizocERiNyE p. 164 



DlPRIONINiE. 



Diprion Schrank. 



Lophyrus Latreille. 

 Antennae multiarticulate, with fifteen or more segments, 

 strongly serrate in the female and bipectinate in the male, the 

 rays shorter toward the apex; larvae infesting various species of 

 conifers. 



Key to Species. 



1. Antennae with sixteen segments, black; head, thorax, abdomen, 



and legs in great part luteous; wings hyaline. Females 



fabricii 

 Antennae with more than sixteen segments 2 



2. Head and thorax for the most part pale. Females 3 



Head and thorax for the most part black. Males 8 



3. Femora black or dusky at base; antennae with eighteen 



segments; antennae and scutellum pale yellow; mesonotum 

 with large black spots occupying the greater part of its 

 surface; head and thorax sparsely covered with deep punc- 

 tures abdominalis 



Femora wholly pale 4 



4. Tibiae waxen white, at least at base; antennae with seventeen 



segments 5 



Tibiae with no part waxen white; antennae usually with more 

 than seventeen segments 6 



5. Antennae luteous brown; tegulae, collar, and pleurae luteous 



brown; a line joining the ocelli, a stripe on each side lobe 

 of the mesothorax, and the sutures of the metathorax, 



black; claws with a tooth near the middle pinus-rigida 



Antennae black, with basal half of third segment pale; tegulae, 

 collar, and pleurae waxen white; sides of metathorax black; 

 claws with the tooth distinctly nearer the apex than the 

 middle abbotti 



6. Lateral lobes of mesonotum pale 7 



Lateral lobes of mesonotum and sutures metallic black; body 



yellowish brown; antennae with eighteen segments, black, 

 the third segment pale at base; claws with a short tooth 

 near the tip abietis 



