174 MEMOIRS ON THE COLEOPTERA 



Paratachys n. gen. 



The few known species of this genus resemble Tachys much more 

 closely than Pericompsus, being depressed, with similar integument, 

 similar position of the dorsal foveae of the elytra on the fourth in- 

 terval, almost punctureless elytral striae, and with the mental for- 

 amina not much larger than in Tachys, but they differ from the 

 latter in the parallel form of the body and entire eighth elytral 

 stria, and not only from that genus but Pericompsus also, in having 

 seven discal striae, very fine and feeble it is true, but easily observ- 

 able by properly reflected light. The two species before me, of 

 which the first should be regarded as the type, may be described 

 as follows: 



Form subparallel, rather shining, pale brownish-flavate throughout, the 

 head in part slightly dusky; head fully three-fourths as wide as the 

 prothorax, with moderate and rather prominent eyes, short, anterior 

 and widely separated sulci and rather approximate superciliary 

 punctures; antennae pale flavate, heavy, two-thirds as long as the 

 elytra, the medial joints less than twice as long as wide, the second 

 much longer than the third; prothorax four-fifths wider than long, 

 equally wide at base and apex, the sides narrowly reflexed, more so 

 at base, broadly rounded anteriorly, oblique in about basal half, 

 becoming sinuate, parallel for some distance before the sharp right 

 angles, the base transverse; subbasal impression obtusely subangu- 

 late, rather deep, the stria distinct, extending almost to the apex; 

 elytra nearly three-fifths longer than wide, barely a third wider than 

 the prothorax, circularly rounded in apical third, the sides parallel 

 and nearly straight; humeri sharply rounded; striae fine but distinct 

 internally, very feeble on the flanks, very obscurely micro-punctulate; 

 anterior fovea rather deep, near basal third. Length 2.0 mm.; width 

 0.7 mm. Texas (Austin) austinicus n. sp. 



Form still narrower, subparallel, rather depressed and very shining, the 

 minute sculpture subobsolete, barely traceable on the elytra; color 

 pale flavo-testaceous throughout; head nearly three-fourths as wide 

 as the prothorax, the eyes small, slightly prominent: sulci short, 

 narrow and very widely separated; antennae rather thick, flavate, 

 scarcely three-fourths as long as the elytra, the medial joints not 

 twice as long as wide, the second slightly though evidently longer 

 and thicker than the third; prothorax short, very nearly twice as 

 wide as long, equally wide at base and apex; sides strongly rounded 

 anteriorly, oblique posteriorly and becoming parallel near the right, 

 sharp and reflexed basal angles; subbasal groove deep, subangulate; 

 elytra fully one-half longer than wide, but little more than a third 

 wider than the prothorax, parabolic in apical third, parallel, with 

 scarcely arcuate sides, the humeri distinct and sharply rounded; 

 pedicel almost half the basal width; striae one and two distinct but 



