NORTH AMERICAN COLEOPTRRA. 81 



ing posteriorly, rounded separately beliind, longer than tlie Iioad and prothorax 

 together, and leaving the last third of the second, the third, fourth and fifth ven- 

 tral segments exposed. Antennae as long as the elytra, first joint moderate, sub- 

 globular ; joints two to eleven, much narrower, sub-equal, but increasing perceptibly 

 in length toward the tip. Length 1.9 mm. 



Plate V, Fig. 7. 



I aui aware of only four specimens, all from Texas. 



2. I. iinmiiiida Roit.— Form moderately elongated and depressed. Surface 

 shining, free from pubescence. Punctures of head and prothorax coarse, and 

 rather close. Color of male brownish black ; of female ratiier dark cinereo-testa- 

 eeous. Head sub-quadrate; eyes small, flat and their own length in advance of 

 prothorax. Prothorax of same width as head, very slightly broader than long, 

 and strongly narrowed posteriorly; sides irregularly undulated. No traces of 

 lateral striae. Elytra very slightly longer than head antl prothorax together, 

 leaving last four abdominal segments exposed, broader posteriorly; width across 

 the base almost equal to that of head. Antennae equal in length to elytra, rather 

 stout, coarsely and sparsely pubescent; joints sub-equal, last joint elongated, and 

 constricted strongly near the tip into a cylindrical process, as in Hemipephis. 

 Length 2.fi mm. 



Plate V, Fig. 8. 



Originally described by Reitter. I have before me two spetiniens 

 from Piney Point, Md. (Schwarz) 



The principal points of distinction between the two species are the 

 size and structure of the antennae, shape of the head and eyes, and the 

 punctuation. The integuments in the last species also seem to be a little 

 denser than in the first. The poculiarity in the structure of the last 

 joint of the antennae, mentioned in the description of I'lnnntitda, also 

 exists in rf'cliis<(, but to a less marked degree. 



L,/EMOI»HL.<EUS De Casteln. 

 Mentum very short. Ligula corneous, entire and rounded in front: imindibles 

 generally short, bi- or tri-dentate at their extremities. Labrum transverse, usually 

 entire: outer lobe of maxilla rounded at the extremity, where it is densely cili- 

 ated; inner lobe terminated by a corneous hook. Antennae variable. Eyes mod- 

 erate or small, convex. Head not restricted behind. Tarsi witii the first joint 

 small; middle and postei'ior four-jointed in the male, all otiiers fiye-jointed. Body 

 more or less depressed. 



In the study of this genus we are met by peculiar difficulties, although 

 the species comprising it present a general y'ac-iV.s- which is unmist:ik:vble. 

 The males and females diifer very much, and, as in the Lueaiiidae, the 

 former are in most cases the larger, and often of different form. This 

 alone serves to make the study of a mass of undescribed species a very 

 unsatisfactory one. The antennae may be terminated by a well-marked 

 club, may be filiform or even attenuated, and are often clubbed in the 

 female, and filiform in the male. The first joint may be very short, very 



TRANS. AMER. ENT. SOC. XI. ' (21) FEBRDARY, 1884. 



