500 bulletin: museum of comparative zoology. 



MiCRORHAGUS VULCANICUS, Sp. nOV. 



Plate 1, fig. 5. 



Form moderately stout. Head finely but closely and rather deeply 

 punctured. Antennae not well preserved, about eight joints remaining 

 which are scarcely serrate and indicate that if entire the antennal apex 

 would pass well beyond the prothoracic hind angles. Prothorax 

 finely, sparsely punctate and strongly hairy, apex much narrowed, 

 sides rather pronouncedly arcuate, hind angles divergent. Scutel- 

 lum injured so that the exact shape is not definable. Elytra a httle 

 arcuate at sides and conjointly rounded at apex, hairy, slightly striate 

 near the base, the remainder of the surface finely punctulate. Length, 

 from front of head to elytral apex, 7.40 mm.; of elytron, 4.85 mm. 



Described from one specimen. 



Type — No. 2,775 M. C. Z. Florissant, Colo. (No. 13,034 S. H. 

 Scudder Coll.). 



This insect has a type of sculpture and vestiture common in the 

 Eucneminae, and if assigned to that subfamily would go in Micro- 

 rhagus by the form of the coxal plates and the apparent structure of 

 the basal antennal joints. Compared with the recent M. triangularis, 

 the present species has finer sculpture throughout and is of larger size. 



MiCRORHAGUS MIOCENICUS, Sp. nOV. 



Plate 1, fig. 4. 



Form fairly stout. Head quite large, strongly transverse, anterior 

 margin arcuate, surface obscurely but closely, and rather coarsely 

 punctured on the front, less strongly on the vertex, which becomes 

 nearly smooth posteriorly. Antennae poorly preserved, not strongly 

 serrate, reaching to or behind the prothoracic hind angles. Pro- 

 thorax about one fourth broader than long, apex narrower than the 

 base, front angles not well marked, sides regularly and moderately 

 arcuate, base nearly truncate, hind angles, (only one of which is 

 preserved), acute, slightly divergent and distinctly carinate. The 

 surface is finely, very obscurely and not closely punctate, with a thin 

 clothing of moderately long dark hairs. Elytra broad at humeri, 

 sinuately tapering behind them, hardly striate and with faint rows of 

 punctures, the vestiture like that of the prothoracic disk. Underside 



