THE PsELAPHIDZ OF NorTH AMERICA. 7 
22 Prothorax without discal crests; 9 last segment pointed, vertical fovea 
nude. (Pacific coast species). 
3° Shoulders hanging, obsolete, intermediate elytral basal fovea confluent 
with the internal one. 
Vertex with a central impression, occiput with arounded tubercle ; 
prothorax with the median sulcus merely indicated near the 
median fovea. Length 1.9 mm. _ British Columbia. 
albionicus. 
Vertex not impressed in the center, prothoracic median sulcus 
nearly entire. Length 1.9mm. Middle California. 
occiduus. 
32 Shoulders moderately prominent, rounded; ¢4 last ventral with a large 
crater shaped fovea. 
Black, legs and antennz brown, occiput carinate; prothorax with- 
out a trace of median sulcus, elytral basal fovez separate, 
conspicuous, Length 2.2mm. Middle California. 
monticola. 
Rust-red or piceous-red, elytra brighter, occiput carinate, protho- 
rax with an anteriorly abbreviated sulcus; intermediate ely- 
tral basal fovez nearly obsolete. 4 with the fovea on the last 
ventral, large, crater shaped. Length 2.2mm. Washington, 
Oregon, California, Vancouver Island. _— - zephyrinus. 
31 Shoulders angular, armed with a minute, blunt tubercle; elytra with 
shallow, irregular, scar-like impressions; elytral basal fovez separate, 
conspicuous. Length1.8mm. Middle California. -  cicatvicosus. 
— 
21 Prothorax with discal crests.  @ last abdominal segment rounded. 
(Eastern species.) 
Elytra strongly punctate, shoulders acutely angulate, 4 last anten- 
nal joint toothed at the base; occipital fovez nude. Length 
1.0mm. Pennsylvania, Illinois. - - - schaumit. 
11 Frontal margin in the ¢ separated from the clypeus by a sulcus or exca- 
vation; in the @ continuous with the clypeus. (Atlantic slope.) 
42 Frontal margin produced (4) beyond the inter-antennal line. 
54 Vertex slightly scabrous, vaulted and carinate; ¢ last antennal joint 
long, with an erect tooth; elytra punctate, shoulders not armed; ver- 
tical fover nude. Length 1.5 mm. Pennsylvania, Illinois. riparius. 
5% Vertex coarsely scabrous, not vaulted, occiput carinate, circumambient 
sulcus obsolete, prothorax trisulcate; ¢ last antennal joint without a 
tooth. 
62 Frontal margin (¢) notched in the middle, overhanging the clypeus; 
occiput carinate, occipital foveee nude; shoulders angulate; head 
orthognathous. Length 2.2mm. Pennsylvania, Illinois. scadriceps. 
16 
IF 
13 
1 
18 
13 
