THE CANADIAN ENTOMOLOGIST. 83 



Posterior femora simple. 

 Body entirely black. 



Legs entirely honey-yellow or ferruginous. 



Wings hyaline ; first abdominal segment narrow, 



shining 5. American us. 



Wings fuliginous ; first abdominal segment broad, 



opaque 6. fulvipes. 



Legs ferruginous, posterior femora, tibire and tarsi black. 7- pedalls. 



i. Helcon occidentalis. 



Hclcon occidentalis, Cress., Proc. Eiit. Soc, iv ; p. 292. °. . 



1 



Colorado. 



2. Helcon borealis. N. sp. 



£ . — Black, opaque ; clothed with a short thin pale pubescence ; top 

 of head, cheeks and space on side of pleura smooth and shining, face 

 finely and densely punctured ; antennre long, slender, brown ; thorax 

 densely, rather roughly sculptured, somewhat coriaceous ; metathorax 

 densely and coarsely sculptured ; tegulse dull honey-yellow • wings hya- 

 line, iridescent, nervures and stigma fuscous ; legs bright honey-yellow, 

 anterior coxae tinged with fuscous, posterior tibiae black, reddish at base, 

 their tarsi pale yellow, dusky at tips, femoral tooth strong and blunt ; 

 abdomen depressed, first segment coriaceous, second and third segments 

 honey-yellow. Length .33 inch. 



Maine. 



3. Helcon albitarsis. N. sp. 



$ . — Head, pro and mesothorax, scutellum and sometimes the pleura 

 entirely black • remainder honey-yellow or ferruginous ; sometimes the 

 pleura is entirely ferruginous, and sometimes the metathorax is obscurely 

 ferruginous, nearly brown ; antennae black or brown ; head and thorax 

 sculptured as in borealis, the metathorax being more distinctly reticulated ; 

 tegulae honey-yellow ; wings hyaline, iridescent, nervures. and stigma fus- 

 cous ; legs bright honey-yellow, posterior tibiae black, reddish at base, all 

 the tarsi white, dusky at tips, femoral tooth acute ; abdomen narrow, 

 shining, first and second segments reticulated ; apical segments sometimes 

 tinged with dusky. Length .27-35 inch. 



