32 [Apkil, 1S44. 



Head slightly narrower than the thorax, faintly longitudinally indented each 

 side between the antenna:, minutely and sparsely punctured, blackish-piceous : 

 antenna; somewhat shorter than the thorax; 4-10 joints of equal thickness; 

 testaceous: thorax narrower than the elytra, subtransverse-oval, distinctly mar- 

 ginate, minutely, though more densely punctured than the head, colour of the 

 head, with the margins narrowly but distinctly testaceous: elytra nearly 

 double as wide as long, very minutely and sparsely punctured, testaceous or 

 rufo-testaceous, with the outer posterior angles, black, sometimes obsoletely : 

 tergum flat, pubescent, very minutely, almost invisibly punctured, testaceous, 

 with the fifth and part of the sixth segment transversly black : feet testaceous : 

 postpectus brown, 



Var. Tergurn black. 



Resembles much G. fasciata, Say, but that species is more distinctly punc- 

 tured, and has its thorax always testaceous. 



3. G. lateralis. Piceous ; head, sides of the elytra, tergum and antennae, 

 hlack; feet testaceous. Nearly 1 1. long. Pennsylvania. 



Head narrower than the thorax, minutely and somewhat densely punctured, 

 deep black, glossy, with the mouth piceous: antennas hardly surpassing the 

 base of the thorax ; joints from the fourth to the tenth subequal, apical joint 

 somewhat thicker than the preceding ; blackish or dark brown, with the three 

 basal joints testaceous : thorax narrower than the elytra, transverse, base and 

 sides rounded ; apex truncate ; angles rounded, anterior ones slightly deflexed ; 

 minutely and densely punctured, reddish-brown, or brown, with the margins 

 piceous : elytra nearly twice as wide as long, punctured as the thorax, pale 

 brown-piceous, with the sides and region of the scutel dusky, darkest near the 

 outer posterior angles : tergum pitchy-brown, or reddish-brown, transversely 

 black before the apex : feet testaceous. 



Tachypohidje, MacLeay. 

 Tachtpohus, Gravenhorst. 



T. punctulatus. Piceous, punctured; mouth and antennae testaceous; 

 thorax, elytra and feet, rufo-testaceous. — 1 I. long. Pennsylvania. 



Head black, glossy : mouth testaceous : antennae, longer than the thorax, 

 with the last joint largest; testaceous: thorax in the middle slightly wider 

 than the base of the elytra ; minutely and confertly punctured, reddish brown, 

 shining : elytra almost double as wide as long, minutely and densely punc- 

 tured, pitchy-reddish-brown, shining : abdomen pitchy-brown, much and finely 

 punctured, with the apex testaceous : feet similarly colored : antepectus color 

 of the thorax. 



Tachintjs, Gravenhorst. 



1. T. discoideus. Rufo-testaceous, impunctured ; anterior middle of the 

 thorax, and region of the scutel dusky ; head black. — 2 1. long. Pennsylvania. 



Form offumipennis, Say, but a little smaller. Head narrower than the apex 

 of the thorax, impunctured, deep black, shining : mouth and palpi testaceous: 

 antennae longer than the thorax, filiform ; third joint nearly twice as long as 

 the second, 4-10 joints subequal, terminal joint ovate; fuscous, with the two 

 basal joints testaceous : thorax slightly wider than the base of the elytra, trans- 



