1928] 
New Coleoptera from Western Hoi Springs 
5 
I take great pleasure in naming this insect after its collector, 
in recognition of his success in collecting hot spring Coleoptera. 
Helmis thermarum n. sp. 
•> 
Elongate, parallel, rather convex. Black or piceous; tarsi, 
palpi, and antennae dull rufous. Last joint maxillary palpus 
about one and one-half times as long as wide. Antennae eleven- 
jointed with the second joint distinctly and evenly inflated. 
Prosternal intercoxal process not quite half as wide as the meso- 
sternum between the coxae; meso- and metasterna sulcate along 
the middle; last ventral segment finely notched at sides. Femora 
sides of ventral surface, and inner side of front tibiae at apex 
clothed with a dense mat of silvery hair, which may, however, be 
partly rubbed away. Prothorax rectangular, distinctly longer 
than wide, a little narrowed at base and apex, the sides broadly 
and shallowly emarginate two-fifths from apex where there is a 
complete transverse impression on the pronotal disk; lateral 
margins finely crenate, nearly paralleled on the disk, about a 
fifth of the prothoracic width from the sides, by a pair of fine 
lateral costae which extend from base to apex except that they 
may be partly or almost entirely obsolete on the interior two- 
fifths; pronotum in anterior two-fifths faintly shining, evenly 
convex, sparsely punctate; pronotum in anterior three-fifths 
opaque, with a low rounded “Y”-shaped elevation running from 
the middle of the base to the transverse impression, where the 
arms of the “Y” terminate on each side of a central foveate de- 
pression; on each side there is also an oblique elevation extending 
from near the base of the “Y” to near the pronotal margin two- 
fifths from base. Elytra about twice as long as wide, the sides 
parallel from just back of humeri to apical third; disk dull, 
finely pubescent; third interval not or but slightly prominent 
at base, seventh interval with a fine inconspicuous costa; discal 
striae marked by rows of very coarse punctures which are larger 
and sub-confluent toward elytral base and which extend to apex, 
giving the whole elytron the appearance of being irregularly 
cribrate. 
Length : 1 . 4-1 . 7 mm. Width : 0 . 5+ mm. 
