FIELD BOOK OF INSECTS. 



legs, and basal joint of antennae are dull yellow; elytra 



reddish-brown or yellow; otherwise black; .5 to .9 in. long. 



Elytra of normal length 7. 



7. Front of face nearly vertical; neck, very short; first 

 joint of hind tarsi much longer than the other joints 

 combined. Tribe Encyclopini. In Encyclops, the only 

 genus occurring in eastern United States, the first, hind- 

 tarsal joint is cylindrical. E. ccemleus is about .3 in. 

 long; almost linear; shiny blue or green. 



Front of face oblique or horizontal; elytra usually 

 tapering to the apex Tribe Lepturini (p. 349). 



8. Second joint of antennae small, not over one-fourth 

 the length of the third; front coxas not conical though 

 sometimes prominent. (Division Cerambycoides) 9. 



Second joint of antennas about one-third the length 

 of the third joint; front coxae globose, widely separated. 

 Division Atimioides. Rare with us. Atimia confusa is 

 about .3 in. long; dull black, clothed with rather long, 

 yellowish pubescence, with irregular, smooth, hairless 

 spots; hind tarsi with the first joint equal to the second 

 and third combined. On conifers. 



9. Eyes coarsely granulated (i. e., the lines between the 

 facets deeply impressed) 10. 



Eyes finely^granulated n. 



10. Front coxal cavities open behind; abdomen normal 

 in both sexes; antennas with the second joint small; scutel- 

 lum rounded behind, except in Chion; eyes not divided, 

 though always deeply emarginate Tribe Cerambycini 



(p. 344)- 



Front coxal cavities angulated, closed behind; first 

 segment of abdomen very long. Tribe Obriini. There 

 are two genera: Phyton, pronotum much narrower at 

 base than at apex; and Obrium, pronotum equally nar- 

 rowed at base and apex. The species are less than .3 in. 

 long. 



11. Elytra either only about as long as the pronotum, 

 or elongated and awl-shaped. .Tribe Stenoptini (p. 345). 



Elytra normal 12. 



12. Scutellum either rounded behind or broadly tri- 

 angular 13. 



340 



