568 TRANSACTIONS OF THE 



The head is large, longer than the thorax. I obtained it on 

 Chinquoteage Island. 



[Afterwards described as Gyrohypnus assi'milis Kirby, G. con- 

 sentancus Nordmann : X. Kiesenwetteri Sachse, Ent. Zeit. 1852, 

 126 does not appear to differ. — Leg.] [453] 



3. X. HAMATUS. — Piceous; antennae, elytra and feet ye^owish. 



Inhabits the United States. 



Head piceous-black, ovate, with sparse, profound punctures, 

 wanting on the longitudinal middle, and immediately in a line 

 behind the eye ; antennae reddish-brown, paler at base ; palpi pale 

 reddish-brown ; thorax rufo-piceous, not distinctly contracted be- 

 hind; dorsal punctures about ten, with an anterior, nearly paral- 

 lel, exterior series of about four; lateral series ten or twelve 

 punctured, extending to the locality of the posterior angle, and 

 at its anterior extremity curved outward and backward with four 

 or five additional punctures ; elytra honey -yellow, sparsely and 

 irregularly punctured ; a somewhat elevated line on the sutural 

 submargin ; feet dark honey-yellow. 



Length about one-fourth of an inch. 



Remarkable for the number of punctures in the thoracic series. 



[Afterwards described by Erichson as X. obscurus. — Lec] 



LATHROBIUM Grav. 



1. L. SIMILIPENNE. — Black ; members rufous or yellowish. 

 Inhabits Mexico. 



Body black, polished, hairy, densely punctured ; antennae red- 

 dish-brown, first and second joints rufous; labrum and palpi 

 piceous ; thorax longer than broad, with a longitudinal glabrous 

 line in the middle and, a glabrous basal margin ; elytra, terminal 

 edge piceous ; tergum with more minute punctures ; more hairy 

 at tip ; feet honey yellow ; thighs pale yellow. 



Length two-fifths of an inch. 



Like most of the species of this genus, the middle of the tho- 

 rax is destitute of punctures ; in this character it also agrees 

 with JStaphi/linus vioJaceus Grav. 



2. L. ARMATUM. — Anterior thighs dilated and angulated be- 

 neath. 



Inhabits Indiana. 



[Vol. IV. 



