1928 ] 
New Coleoptera from Western Hot Springs 
3 
Comparative Zoology, the United States National Museum, 
the California Academy of Sciences, the collection of Mr. H. C. 
Fall, and the collection of the writer. 
The semi-transparent elytra and striking secondary sexual 
characters of the cf make this a very distinct and easily re- 
cognized species. In Mr. Fall’s table in the “North American 
Species of Coelambus,” published by John D. Sherman Jr., Mt. 
Vernon, N. Y., 1919, it would run to near C. pedalis Fall, from 
which it may be distinguished by several definite characters. 
Direct comparison shows that C. thermarum is also a narrower 
species with a proportionately smaller prothorax and narrower 
head. For the opportunity of examining the type and type series 
of C. pedalis at Tyngsboro I am indebted to Mr. Fall, whose ex- 
cellent revision of Coelambus has made the placing of the present 
species ridiculously easy. 
Ochthebius bruesi n. sp. 
Elongate, slightly depressed. Black; head and pronotum 
with distinct aeneous or metallic rose reflections; elytra entirely 
piceous to testaceous with piceous humeri and base; legs dull 
rufous, tarsi and basal part of femora darker; antennae and 
maxillary palpi rufous, the latter with the ultimate and the tip 
of the penultimate joints fuscous. Ultimate joint of maxillary pal- 
pus twice as long as wide, narrowed and rounded at apex, but 
subject to modification; penultimate joint typically convex on 
all sides, but at times flattened and concave on one side, as des- 
cribed below. Head bifoviate between the eyes; labrum entire,, 
feebly rounded in front. Prothorax about two-fifths wider than 
long, widest about two-sevenths from the distinct but not pro- 
minent apical angles, rather strongly narrowed and with very 
broadly and evenly recurved sides in posterior five-sevenths; 
lateral transparent membrane beginning a little behind anterior 
angles, widest near base, where about one-seventh as wide as 
prothoracic base; median groove well impressed, nearly com- 
plete; discal impressions deep, well separated, the posterior 
longer, placed nearly as in 0 . interruptus ; lateral grooves narrow, 
well impressed; pronotal disk rather strongly shining, not or but 
