COLEOPTERA OF BAJA CALIFORNIA. 375 



with the thorax not wider than the elytra and margined 

 at the sides with yellow. It is, therefore, systematically 

 related to tiita and Hcpbiiniii, from both of which it dif- 

 fers, apart from its markings, by the much more promi- 

 nent double margin of the last ventral segment. 



Occurs at San Jose del Cabo and Coral de Piedra, 

 Sierra el Taste. 



AcM^ODERA CRiBRicoLLis n. sp. Plate viii, fig. 4. 



Moderately elongate and convex, piceous, faintly 

 bronzed on head and thorax and beneath, sparsely in- 

 vested with short erect whitish hairs. Front convex, 

 coarsely and closely punctate, occiput carinate. Thorax 

 unicolored, twice as wide as long, widest behind the mid- 

 dle, sides arcuate and narrowing to the apex, sinuate be- 

 hind the middle, the hind angles (directly from above) 

 rectangular, lateral margin very narrow not visible from 

 above, disc convex, a vague depression at middle, a faint 

 oblique depression each side, a small fovea each side near 

 the base, surface densely cribrately punctured and opaque. 

 Elytra narrower at base than the thorax at middle, sides 

 parallel to middle then arcuately narrowing to base, mar- 

 gin serrate, striae with coarse deep, closely placed punc- 

 tures, the intervals slightly convex and scarcely wider 

 than the stria?, each with a row of setigerous punctures, 

 surface ornate with yellow in a st3de similar to variegata. 

 Prosternum coarsely and closely punctate, anterior mar- 

 gin truncate. Metasternum coarsely and densely punc- 

 tate. Abdomen moderately coarsely and closely punc- 

 tate at sides, a little less so at middle. Last ventral with 

 single apical margin. Body beneath sparsely cinero- 

 pubescent. Length, .40 inch ; 10 mm. 



This species is the most obtuse in front of any known 

 to me. The thoracic sculpture is of rare occurrence, 



