110 
Psyche 
[June 
rowing to base and with a sharp corner at basal angle; pronotum 
slightly convex with flattened disc, two slight callosities smoother 
and less punctate on either side and slightly in advance of middle 
of disc, and at base two other small knobby callosities, also pol- 
ished and impunctate, these more closely set; a transverse basal 
groove extending from near margin and slightly deeper at outer 
ends thus forming a fovea on either side, the basal groove in- 
terrupted at middle. Surface of pronotum coarsely and densely 
punctate with flat shining interspaces, and somewhat pubescent. 
Scutellum broad and short, rounded at base, finely punctate 
and pubescent. Elytra convex, elongate, subparallel, wider 
than prothorax with small rounded humeri and depression 
within; punctation dense, coarse, shallow; surface shining and 
with light, short pubescence; sutural margin wide and distinct. 
Near apex of each elytron a small polished callosity, frequently 
paler in color, these callosities not as apparent in male but still 
quite discernible. Body beneath shining, covered with short, 
dense pubescence and densely punctate, the punctures on meta- 
sternum coarse and becoming confluent, on abdomen much finer 
and denser. First abdominal segment nearly equal in length to 
second and third together, the second, third and fourth gradually 
diminishing in length. Femora attached obliquely to trochan- 
ters, the latter small and elongate. Tarsi 5-jointed except the 
hind tarsi of male, these 4-jointed. Each segment of tarsus with 
long, sharply pointed tuft of hair beneath, the segments slender 
and not lobed. 
Length : 3 . 6-4 . 2 mm. Width 1 . 3-1 . 5 mm. 
Type: Cat. No. 40795, U. S. N. M. Three $ $ and one d 
paratypes. 
Type locality: Mt. Vision, alt. about 150 meters, Inverness 
(on Tomales Bay), Marin County California. 
Food plant: In fungus ( Polyporus volvaius Peck) growing on 
fallen pine tree, collected 7 August, 1927, by D. H. Blake. 
The sexual differences are quite apparent. The males have 
4-jointed hind tarsi, and show a slight concavity in the last three 
ventral segments, which in the females are full and rounded. One 
of the two males is markedly shorter and broader in proportion • 
