282 MEMOIRS ON THE COLEOPTERA 



lines, wanting apically; in about basal fourth the surface becomes 

 blackish, with very dense, transversely interlacing incised lines; 

 under surface polished black, with faint violaceous lustre, with some 

 small areas of ochraceo-opacity along the sides of the body; sternal 

 sculpture consisting of fine wavy, widely separated and incised lines, 

 bearing fine sparse hairs; anterior tibiae tridentate, the upper tooth 

 smaller and feebler in the male. Length (cf 9 ) 19.0-19.5 mm.; 

 width 10.5-10.8 mm. Mexico (Durango City), Wickham. 



*cuneata n. sp. 



Basal lobe of the prothorax narrower, its base much less than half the 

 maximum thoracic width 6 



6 Londitudinal discal lines of the elytra obsolete. Body nearly as in 

 the preceding but narrower and not quite so depressed, the uniform 

 densely opaque upper surface pale yellowish-ochreous; head rather 

 sharply elevated along the middle, the dense ochreous indument 

 uneven in distribution in the type; punctures rather coarse and deep 

 but not dense, the apex as in the preceding but less sinuate; prothorax 

 similar but with numerous coarse crescentic punctures throughout, 

 though especially conspicuous toward the sides; apical margin with 

 a feeble callous elevation at the middle; mes-epimera with only a 

 few small simple punctures near the edges; elytra almost one-half 

 longer than wide, rather cuneiform but with the sides not so straight 

 as in cuneata and with the apical angle much more broadly rounded, 

 the suture posteriorly but feebly elevated, the apical angles not so 

 lobiform; surface completely punctureless, excepting a few simple 

 punctures disposed sparsely and in irregular series along the median 

 line of each, wanting apically and basally; pygidium with indument 

 disposed as in the preceding but more convex and with a greater 

 number of scattered, transversely wavy incised lines, the apical 

 angle much more narrowly rounded; under surface nearly similar, 

 the teeth of the anterior tibiee all much shorter, broader and more 

 obtuse than in cuneata. Length (cf) 18.5 mm.; width 10.3 mm. 

 Mexico (probably from near Jalapa) *lobiculata n. sp. 



Longitudinal discal lines feeble as usual though evident posteriorly by 

 oblique illumination 7 



7 Body oblong-suboval in form, the elytra but little narrowed from base 

 to apex. Upper surface densely opaque, uniform and more ashy 

 cinereous than in the two preceding or two following species; head 

 with dense indument except at the edges, rather finely, not densely 

 punctate, the punctures bearing short hairs; apex thickened and 

 feebly sinuate; prothorax as usual but wholly without punctures, 

 excepting a very few fine and simple along the sides; apical margin 

 with a small tumidity at the middle; elytra shorter, barely a third 

 longer than wide, the apical angles broadly rounded, the suture 

 barely at all elevated posteriorly, with the angles obtusely lobiform; 

 punctures fine and simple, rather numerous in posterior and inner 

 half but wanting elsewhere; they are arranged in about four rather 

 regular series, with scattered punctures intermediately; pygidium 

 moderately convex, shining and blackish throughout, very evenly 

 and densely incised in close-set transverse and non-vermiculate 



