1897.] NATURAL SCIENCES OF PHILADELPHIA. 241 



3. Wings at the most with the tips fuscous ; middle segment more 



or less rugose, 4. 



Wings fasciate, the fascia including second submarginal and 



apex of third discoidal cells, tips also fuscous ; joints 4-8 of fla- 



gellum white ; legs fulvous ; pronotum maculated with yellow, 



albimacula. 



4. Head and thorax blue-green ; body pubescence cinereus ; anterior 



tibiae and femora except base red ; wings clear, nervures black, 



rugosa. 



Head and thorax coppery-green ; body pubescence golden ; legs, 

 (except coxa?), trochanters, base of femora, hind tibia? apically 

 and apex of tarsi red ; wing with a slight yellowish tinge, 

 nervures testaceous, producta. 



MALES. 



1. Wings fasciate, 2. 



Wings not fasciate, at most with tips fuscous, 3. 



2. Wings trifasciate; black, with exception of the scape, pedicellum, 



fore tibiee and tarsi, which are reddish ; anterior margin of 

 clypeus and sides of face narrowly whitish ; tibial spurs testa- 

 ceous, trifasciata. 



Wings bifasciate, fuscous ; fore legs except coxse, the medial 

 femora and tibia?, hind femora, first segment at sides and second 

 at base reddish ; sides of face and clypeus, tibial spurs and last 

 segment whitish, fragilis. 



3. Greater part of abdomen dark, the base pale, 4. 



Abdomen reddish-testaceous, the apical segments more or less 



obscure ; prothorax, pectus and legs except apical tarsal joints 

 yellowish-testaceous ; thorax blue above ; clypeus and face yel- 

 low ; first three antennal joints yellowish-testaceous, (remain- 

 ing joints wanting), testacea. 



4. Black, with cinereous pubescence ; calcaria white ; medial tarsi 



white, ringed with black at apex of joints, .... cingulata. 



Head and thorax greenish ; sides of face whitish ; four hind 



tibia? and tarsi black, basalis. 



DIPOGON n. gen. 



Allied to Agenia. Head rather flat, broader than thorax; eyes 

 scarcely separated from base of mandibles, inner margins almost 

 parallel ; ocelli distinct, forming a triangle; antenna? rather short, 

 shorter than in any species of Agenia known to me, but not thick ; 



