170 Trans. Acad. Sct. of St. Louis. 
than at the eyes; prothorax obviously narrower than the head, dis- 
tinctly and rather strongly obtrapezoidal, somewhat wider than long, 
the sides nearly straight and the angles moderately broadly rounded; 
elytra scarcely wider and but little longer than the head, not quite as 
long as wide, a fifth wider and one-third longer than the prothorax; 
body moderately stout, piceous-black, prothorax slightly paler, the 
elytra and legs rufous, the head rather densely punctate, the pronotum 
more sparsely and shining. Sinus of the fifth segment unusually 
narrow, but little more than half as wide as the apex and shallow, the 
process unusually wide and large, three-fourths as wide as the sinus, 
broadly sinuate in its median three-fourths in circular arc; fimbriate 
sides of the\ segmental sinus very short, strongly curved and with 
about five spinules. Length 3.8 mm.; width 0.8 mm. California 
(locality UnTeCOPded) ...cesevccccccccccecccccseccessoe GimOrme N. Sp. 
12 — Process slightly more than one-third the total width of the sinus, its 
sides diverging at an angle of 45° to the base, its sides at apex broadly 
rounded, its median sinus feeble in circular arc, broadly toward the 
middle; fimbriate sides or the principal sinus broadly, evenly and 
feebly curved; surface of the fifth segment not fiattened. Body mod- 
erately slender, piceous-black, rather shining, finely and not closely 
punctate anteriorly, the prothorax slightly, the elytra and legs dis- 
tinctly, paler; head rather small and narrow, as long as wide, the 
basal angles very broadly rounded, the sides thence to the well devel- 
oped eyes straight and parallel; prothorax well developed, fully as 
wide as the head, parallel and straight at the sides, a little wider than 
long; elytra scarcely as Jong as wide, rather more than a fourth wider 
and fully one-third longer than the prothorax; gular sutures gradually 
becoming very approximate posteriorly, slightly impressed. Length 
4.0mm.; width 0.8mm. California (Mendocino and Sta. Cruz Cos.). 
retrusum Csy. 
Process much wider, broadly arcuate throughout or becoming slightly 
truncate toward the middle, never distinctly sinuate. .............. 18 
13 — Body less slender, piceo-rufous, the head darker and the abdomen 
black; head as wide as long, parallel and straight at the sides behind 
the eyes with the basal angles rounded, not evidently wider than the 
prothorax, the latter distinctly wider than long, parallel at the sides 
with rounded angles; elytra quadrate, much wider and longer than the 
prothorax. Process in the sinus of the fifth segment broadly, evenly 
arcuate throughout its width and fully half as wide as the sinus. 
Length 4.0 mm.; width 0.85mm. California (Napa Co.).sublestum Csy. 
Body slender, piceous, the prothorax and flanks of the elytra nubilously 
pale, the legs very pale; surface shining anteriorly; head rather wider 
than long, parallel and straight at the sides, distinctly wider than the 
prothorax, the basal angles rounded; prothorax straight and parallel at 
the sides, fully as long as wide, with broadly rounded angles; elytra 
rather longer than wide, nearly one-half wider than the prothorax and 
three-fifths longer; gular sutures quite distinctly, though narrowly, 
separated; parallel,except anteriorly, where they become rather ab- 
ruptly divergent. Process of the fifth ventral very large, three-fifths 
as wide as the sinus, broadly arcuate throughout its width and becom- 
