128 MEMOIRS ON THE COLEOPTERA 



and gradually subacute in posterior two-fifths, the apical lobe not 

 differentiated, widest at the middle, the sides arcuate though very 

 feebly converging basally; surface of each with three thin carinse, 

 the first from base for three -fifths, the second from base straight and 

 parallel to the first to beyond three-fifths, then curving inward 

 slightly and thence parallel and straight to apical sixth, the outer 

 beginning abruptly at basal fifth or sixth, parallel to the arcuate 

 side margin to apical fifth, the side margin finely cariniform, slightly 

 reflexed, extending to the end of the second carina, becoming strongly 

 reflexed at the distinct but bluntly rounded humeri, the suture also 

 finely elevated; interspaces flat, densely opaque, sculptureless, each 

 with a single median series of moderate perforate punctures, and, 

 toward the carinae, clothed rather densely with coarse subdecumbent 

 yellow hairs which are directed obliquely outward; abdomen rather 

 shining, somewhat finely, closely, subasperately punctate. Length 

 (cT) n.o mm.; width 5.0 mm. Arizona (Huachuca Mts.). 



laciniata n. sp. 



Form oblong-oval, stouter and much larger, black, opaque, the punctures 

 of the anterior parts and under surface each with a very minute hair, 

 the elytra completely glabrous, except on the basal slope, which is 

 clothed densely with pale hairs, the basal margin of the pronotum 

 also densely clothed with similar hairs, in both cases except at the 

 sides; head moderately impressed, somewhat coarsely, densely 

 punctate basally but feebly and sparsely so anteriorly; antennae 

 rather short and stout; prothorax one-half to three-fourths wider 

 than long, the apex evidently narrower than the base, deeply sinuate, 

 the angles rather blunt at tip; sides evenly and moderately arcuate 

 throughout, rather more strongly anteriorly, the basal angles 

 acute and posteriorly prolonged within the reflexed humeri; base 

 truncate, deeply sinuate at each side; surface very feebly convex, 

 gradually tumid toward the smooth elevated subcariniform median 

 line and with a large rounded pit, deep to evanescent, at each side 

 of the keel at or just before the middle, the sides gradually rather 

 broadly concave; punctures coarse but very unequal and irregular, 

 very coarse and confluent near the keel, smaller and sparser thence 

 to the sides, with large irregular smooth patches, somewhat trans- 

 versely rugulose near the edges, which are even though thick, 

 punctate; scutellum small; elytra moderately convex, gradually 

 pointed and moderately declivous behind, a third to slightly more 

 longer than wide, a fourth or less wider than the prothorax, the 

 carinse thin and strongly elevated, slightly shining, disposed as in 

 laciniata, the intervals smooth, very opaque, with very minute 

 remote punctulation and a more regular series of more distinct 

 punctures near the cariniform sutural edges; humeri strongly reflexed ; 

 abdomen closely but not deeply punctate and finely, transversely 

 subrugose. Length (cf, 9) 15.5-18.0 mm.; width 7.3-8.8 mm. 

 Mexico (Promontorio, Durango elevation 2400 metres). 



*bibasalis n. sp. 



4 Third elytral carina basally abbreviated as in the preceding species. . 5 



