1 78 MEMOIRS ON THE COLEOPTERA 



and more prominent than the eyes; prothorax very nearly twice as 

 wide as long, subparallel and strongly arcuate at the sides, which 

 are more converging and less arcuate anteriorly, the apex much 

 narrower than the base, moderately and circularly sinuate, with 

 the angles right, not much produced but not at all blunt; base trans- 

 verse, the dentiform protuberances acute at tip and projecting behind 

 the edge, separated by nearly half the basal width, the angles very 

 obtuse but distinct; surface strongly convex, strongly declivous 

 posteriorly between the swellings, very feebly impressed on the 

 median line at the centre, very finely, remotely punctulate, each 

 puncture filled by the base of a hair, the sides moderately broadly, 

 deeply concavo-explanate, equal from apex to base and with larger 

 but very sparse punctures, the edge strongly upturned, thin and 

 irregularly, feebly crenulate; scutellum well developed, triangular; 

 elytra evenly oblong-oval, not quite one-half longer than wide, about 

 a fourth wider than the prothorax and between three and four times 

 as long, the sides evenly and moderately arcuate, rounding in rapidly 

 behind, the apical lobe from above small, obtuse and moderately 

 distinct, the basal angles obtuse but distinct; surface more opaque 

 than the pronotum, with very feeble unduliform ridges, minutely, 

 remotely punctulate, the long erect hairs rather stiff, the shorter 

 and more decumbent hairs more numerous but not forming vittse; 

 side margins acute, unevenly and finely crenulate, feebly elevated 

 near the humeral angles; abdomen finely opaculate, extremely 

 minutely and sparsely punctulate, the hairs fine, pale and very short; 

 legs relatively rather short, slender. Length (9) 19.0 mm.; width 



9.7 mm. Texas duplex n. sp. 



Body similarly short and convex, black, subopaque; prothorax much less 

 transverse, strongly gibbous, the side margins broad, thickened and 

 slightly reflexed in front, gradually narrowing to the base; apex deeply 

 sinuate, the angles acute; base rounded and with three deep im- 

 pressions, one scutellar and one on each side, the resulting promi- 

 nences almost similar to those of duplex; elytra broadly oval, the 

 marginal ridge distinct; base truncate, the angles distinct. Length 

 21.2-25.0 mm. Lower California. [Asida gibbicollis and gabbi 

 Horn] gibbicollis Horn 



In gibbicollis there is no recorded reference to pubescence of any 

 kind, but, in view of the evident close relationship of the species 

 with duplex and villosa, I think there can be but little doubt, either 

 that this feature was inadvertently omitted or that the type speci- 

 mens were old and denuded. I have restored its original name, 

 which is not preoccupied in Trichiasida. From the Asida villosa 

 of Champion, described from Puebla, Mexico, duplex differs ap- 

 parently in its sparser vestiture, by the concave margin of the pro- 

 thorax not being broader toward base, the converging sides apically 

 not sinuate, the anterior angles not so acute or produced and the 



