TRIBE XIX. ZYGOPINI. 417 



Tribe XIX. ZYGOPINI. 



Small species of a peculiar facies principally distinguished by 

 their large eves which are nearly contiguous above and not cov- 

 ered in repose. In form they are either short, squat and sub- 

 rhomboidal or more elongate and subcylindrical. They have the 

 beak long, slender, feebly curved, and in repose usually lying in 

 a dec 1 ]) prosternal groove; first and second ventrals long, the 

 others usually much shorter; abdomen rarely horizontal as in 

 most other rurculios, but sloping strongly and obliquely upward; 

 pygidium of our eastern genera completely concealed by the 

 elytra ; legs slender, front coxa? elongate and prolonged to a point 

 on the inner side; claws simple, divergent. 



The name of the tribe is from the Greek zygops. meaning 

 "joined'' + "eyes". The adults, like certain Buprestids, often 

 rest motionless on the bark of felled or decaying trees. They 

 abound in the forest regions of tropical America and warmer 

 parts of the old world but none occur in Europe. About 30 

 species, distributed among seven genera, are known from the 

 United States. They have been treated in recent years by 



Heller. K. M. "Zygopiden Studien II," 1895. 



Casey, T. L. "Zygopini" in- Ann. N. Y. Acad. Sci., IX, 1897, 



666678. 

 Fall, H. C. "New Species of American Coleoptera of the 



Tribe Zygopini," hi Trans. Am. Ent. Soc., XXXII, 1905, 



53 Gl. 



Of the 30 species, 11, belonging to five genera, are known 

 from the eastern United States. 



KEY TO EASTERN GENERA OF ZYGOPINI. 



a. Abdomen rapidly ascending toward the tip; eyes narrowly separated 



on the front. 



&. Femora armed beneath with a small but distinct tooth; mesoster- 



num excavated to receive the tip of beak I GELTTS. 



5&. Femora unarmed beneath; mesosternum not excavated (except in 



Eulechriops), the beak free at tip. 



c. Antennal club well developed, distinctly pubescent; scales of body 



broadly oval and nonstrigose; larger species, 2 4 mm. in 



length. II. CYLINDROCOPTITRUS. 



cc. Antennal club very small, subglabrous; scales elongate and stri- 



gose; smaller, less than 2 mm. in length. III. EULECHRIOPS. 



aa. Abdomen horizontal throughout; eyes scarcely separated above. 



rl. Beak free throughout, the prosternal groove subobsolete; femora 



minutely toothed; size larger, 3 4 mm. IV. ACOPTUS. 



del Beak partially received in a shallow groove; femora not toothed; 



smaller, less than 2 mm V. PSOMUS. 



