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 little 
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. 
MIcrorRHAGUS 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 
