18 Journal Xevv York Entomological Society, t^'^'- >^xix. 



Key to Eastern Species of Longitarsus. 



a. Elytra at base distinctly wider than thorax ; humeri and umbones more 

 or less evident; body winged. (Subgenus Longitarsus.) 

 b. Color either testaceous or reddish-brown. 

 c. Larger species, length more than 2.2 mm. 



d. Rufo-testaceous, upper surface not alutaceous : length 3 mm. 



subrufus Lee. 

 dd. Rufo-castaneous ; length not more than 2.5 mm. 



e. Joints 2, 3 and 4 of antennse subequal in length or joint four 

 but slightly longer than two ; surface not alutaceous. 



alternatus Ziegl. 

 ee. Joints 2. 3 and 4 of antenns gradually longer, four being 

 double the length of two : surface minutely alutaceous. 



arenaceus new species. 

 cc. Smaller species, length not over 2 mm. 

 /. Upper surface nowhere alutaceous. 



g. Antennae with four basal and three apical joints reddish-yel- 

 low, the internaediate joints fuscous; elytra rufo-testaceous, 

 each with a fuscous cloud at middle : length 2 mm. 



heliophyti Horn. 



gg. Antennae fusco-piceous, the three or four basal joints alone 



pale ; elytra dull testaceous without fuscous median spots 



but with a vague common w-shaped scutellar blotch : length 



1. 3-1. 5 mm fuscicornis Blatch. 



//. Upper surface, at least of elytra, distinctly alutaceous. 



h. Joints 2, 3 and 4 of antenn.-e subequal in length ; elytra not 

 shining but with a distinct greasy aspect. 

 i. Elytra nearly three times as long as thorax, coarsely aluta- 

 ceous ; form more robust, convex ; punctures of thorax 



very evident ; length 2 mm testaceus Melsh. 



a. Elytra only twice as long as thorax, minutely alutaceous ; 

 form more slender, subdepressed ; punctures of thorax 



almost invisible; length 1.6-1.8 mm cotuluss Blatch. 



hh. Joints 2, 3 and 4 of antennae unequal, gradually longer; 

 elytra alutaceous but shining and without a greasy aspect, 

 the punctures distinctly coarser than in either testaceus 



or cotulus ; length 1.8—2 mm suspectus new species. 



bb. Color either piceous or dark brown. 



y. Larger species, length 3-3.5 mm traductus Horn. 



jj. Smaller, not over 2.5 mm. 



k. L'pper surface strongly shining, not at all alutaceous. 



3 In lifting up an elytron of the type the wing must have adhered to the 

 under surface and was not discovered, as I described it erroneously as apterous, 

 whereas the wings are as fully developed as in any other species of this group. 



