Coleopterological Notices. 1G5 



long as the club, in pacijicus three-fourths, and in jmi'vwolHs about 

 equal in length, the comparisons being- made from males. In the 

 female of Agassii the club is small and very distinctly shorter than 

 the funicle. 



P. paciflciis n. sp. — Oblong, rather convex, polished, black ; sides 

 parallel and nearly straight. Head moderate in size, sparsely, coarsely 

 punctate ; antennal club distinctly longer than the funicle, last joint almost 

 symmetrical, distinctly wider than long. Prothorax widest at one-third the 

 length from the base, where it is two and one-half times as wide as the head, 

 and two-thirds wider than long ; sides — viewed vertically — broadly rounded, 

 sinuate near the basal angles which are acute, .not rounded, and slightly 

 prominent ; apex slightly narrower than the base, broadly and feebly emar- 

 ginate, the latter transversely truncate ; disk broadly convex, rather broadly 

 and strongly reliexed at the sides, very sparsely, finely punctate in the middle 

 with an impunctate median line ; punctures miich denser laterally ; in the 

 reflexed portion along the margin they are again sparser but much coarser. 

 Scutellum ogival, slightly wider than long, punctate at base, impunctate in 

 the apical half. Elytra at base about as wide as the prothorax ; sides parallel, 

 distinctly arcuate jjosteriorly, straight in the basal third or fourth ; together 

 broadly rounded behind ; disk transversely, rather strongly convex, two and 

 three-fourths times as long as the prothorax ; striae feeble, rather closely 

 punctate, equidistant ; intervals very feebly convex, creased, more finely and 

 very sparsely punctate. Legs black ; tarsi very slightly paler toward apex, 

 the posterior nearly as long as the tibise. Length 10.0 mm. ; width 4.2 mm. 



California. 



This species is easily distinguished from Agassii by its very 

 sparse punctuation and form of the prothorax, the sides of the 

 latter being much more broadly rounded, when viewed vertically, 

 than in Agassii, although when viewed obliquely they are sub- 

 angulate. 



SCARABJEIDiE. 



ACOMA n. gen. (Melolonthinse). 



Clypeus rather prolonged, concave; apex with a small median notch and 

 feebly bidentate, strongly infiexed for a great distance beneath, the labrum 

 entirely connate and obsolete, not visible except as a minute reflexion of the 

 infraclypeal surface. Mentum minute, very narrow, elongate, nearly flat. 

 Maxillas large, the palpi rather large ; basal joint small ; second and third 

 subequal, longer than wide ; fourth as long as the pre(;eding together, wider, 

 elongate-oval, with a broad shallow groove on the outer face throughout the 

 length, the apex with a minute oval impressed area. Labial palpi very 

 minute. Eyes large ; inferior portion much larger than the upper, separated 



