102 AMERICAN COLEOPTERA. 



ous in great part. The type above described is a cf , having 

 at the apical margin of the fifth ventral a group of asperate 

 punctures bearing short stiff bristles, the sixth deeply tri- 

 angularly emarginate at apex, and the seventh very narrowly 

 but deeply triangularly incised. The short equal spinules 

 of the posterior tibiae associate this species with splendidus 

 and flavicollis, with which it agrees also in the absence of all 

 pronotal discal punctures. Dr. Horn intimates in his general 

 remarks on Mycetoporous that there are in all species two dis- 

 cal punctures, one behind the other, between the middle and 

 lateral margin. He either failed to observe or omitted to 

 note that these punctures are not present in those species 

 having the middle and hind tibiae fringed with equal spinules. 

 As remarked by Casey, LeConte's original descriptions were 

 more precise in this respect. The absence of the sutural 

 stria is peculiar to this and the following species, and there 

 is little doubt from the appearance of the elytra that these 

 species are truly apterous. 



M. my ops n. sp 



Head, prothorax, and elytra piceous, highly polished, abdomen 

 dark rufous, legs and antennae pale rufous. Head longer than wide, 

 eyes small, the distance from their posterior margin to the base of the 

 head nearly twice the length of the eye. Antennas distinctly shorter 

 than in the related species, joints 6-10 evidently transverse, 11th as 

 long as the two preceding. Prothorax without discal punctures, the 

 two median ones of the basal margin more removed from the margin 

 than usual, being nearly at the basal fourth. Elytra a little transverse, 

 no sutural stria, with sutural series of four setigerous punctures, 

 dorsal series of five or six, and marginal series of eight. Abdomen 

 sparsely finely punctate. Length 2k mm. 



Fieldbrook, Northern California. (Mr. H. Barber.) Very 

 closely allied to the preceding, differing in the smaller size, 

 narrower head, smaller eyes, different position of the median 

 marginal punctures at the base of the pronotum, and in the 

 more finely sparsely punctured abdomen. 



BLEDIUS Leach. 

 B. armatus Say. 



There is in my collection a series of specimens from 



Nebraska — in part collected by Mr. Knaus — which agree 



perfectly with Say's description of this species, and are, I 



