424 MEMOIRS ON THE COLEOPTERA 



Tribe TANYGNATHINI 

 Tanygnathus Er. 



In this singularly isolated genus the body is small in size, elongate- 

 fusoid in form, rather convex and shining, the abdomen rapidly 

 tapering. The head is small, the front of peculiar form, broad and 

 transversely truncate at apex, flat antero-laterally, with the median 

 part, at the sides of which the antennae are inserted, convex and 

 parabolic in outline, the labrum large, transverse, thin and sub- 

 membranous, arcuato-truncate, with a small median sinus; the 

 last joint of the maxillary palpi is long and extremely thin and 

 aciculate, the antennae rather long and slender. The anterior 

 coxee are extremely large and the tarsi are 5-4-4 jointed, the anterior 

 short and rather thick, the two posterior long and slender, all rather 

 hairy. Erichson and Horn both omitted to observe that the an- 

 terior tarsi are 5-jointed. We have two species as follows: 



Body moderately slender, shining, rufo-piceous, the elytra blackish, with 

 the suture and apex finely rufous, the prothorax testaceous, in- 

 fumate slightly toward apex; head a little more than half as wide as 

 the prothorax, the eyes small, rather convex and subbasal; antennae 

 very slender, slightly longer than the head and prothorax, blackish, 

 the basal and outer two or three joints flavescent; prothorax nearly 

 a third wider than long, rounded at base and on the sides, the latter 

 gradually converging anteriorly; disk with a single puncture at each 

 side of the median line just before the middle of the length; scutellum 

 punctulate; elytra distinctly shorter than wide, together broadly and 

 subangularly sinuate at apex, at base narrower, at apex fully as 

 wide as, the prothorax; surface minutely, very densely punctulate 

 and very finely pubescent, having each a line of three small setigerous 

 foveae at outer third; abdomen with longer and more conspicuous but 

 much less dense pubescence, the segments finely and very densely 

 punctured toward their bases, the apices sparsely punctulate and 

 paler than the basal parts; sixth ventral (9 ) narrow, subcircularly 

 rounded at apex; legs pale brown; middle coxse very large, flat, 

 obliquely oval, extending virtually to the elytra, the hind coxae small 

 and contiguous. Length ( 9 ) 2.7 mm.; width 0.68 mm. [T.collaris 

 Horn nee Erich.] Florida (Sand Point), Schwarz. .bicolor n. sp. 



Body rather larger and stouter, the abdomen more acuminate, shining, 

 dark rufo-piceous in color, the abdominal segments broadly paler 

 toward their apices, the elytra hubilously and faintly paler apically 

 and suturally, the prothorax testaceous but differing from the elytra 

 far less in color than in bicolor; head slightly infumate, narrower than 

 in the preceding, about half as wide as the prothorax; antennae 

 very slender, colored somewhat as in bicolor, the minute dense gray 

 pubescence more evident, very finely filiform (cf ) and extending to 



