126 MEMOIRS ON THE COLEOPTERA 



posteriorly and having very sparse and extremely minute thin 

 yellowish hairs. Length (cf , 9 ) 15.0-17.0 mm.; width 8.2-9.6 mm. 

 Mexico (Promentorio, in the Sierra San Francisco, Durango 

 altitude 2400 metres) *evertissima n. sp. 



Abstrusa closely resembles suturalis Champ., but appears to be 

 narrower, more parallel and more depressed, having the elytral 

 base not obviously wider than the prothorax though the original 

 description of suturalis may be drawn from the female. The pro- 

 thorax, also, is evidently shorter and more transverse, with less 

 rounded sides and the sides of the elytra are less rounded, the surface 

 laterally without any definite transverse wrinkles. On each side of 

 the median line of the pronotum in the type of abstrusa, and just 

 before the middle, there is a small and shallow but distinct rounded 

 indentation, not connected in any way with the small embossed 

 smooth spots; no allusion is made to these indentations in the de- 

 scription of suturalis, and it is of course possible that they may be 

 spurious. On the whole abstrusa is, however, so closely related to 

 suturalis that it may prove to be not fully distinct. The fifteen ex- 

 amples of evertissima in my cabinet indicate a species allied to 

 geminata Champ., but agreeing scarcely at all with the figure of 

 that species given on the plate, the prothorax being very much 

 more elongate and relatively larger in both sexes; the elytra, more- 

 over, do not slope obliquely toward the humeri and the pronotum 

 has, besides the oblique smooth spot at each side of the middle, 

 another rounded and more anterior; these spots are rather inconstant 

 in extent. The minute hairs of evertissima could not be termed scaly, 

 although sometimes very coarse. Intricata, of Champion, would 

 also without much doubt belong to Notiasida, were it not for the 

 statement that the prosternal process is subhorizontally produced, 

 the mesosternum being somewhat excavated for its reception, which 

 would seem to militate against such an assignment. 



Parasida n. gen. 



The general form and anatomical features of the body in this 

 genus are nearly as in Notiasida, but the elytral structure is quite 

 different, the costae usually having the form of thin acute and very 

 regular carinae, becoming lower and more obtuse though still 

 regular in some forms, such as laticollis and planatula; the outer 

 costa shows no tendency to join the side margin as it does in Eu- 



