18 Coleopterological Notices, III. 



lineata in its larger size, broader and more depressed form and 

 sparser vestiture, in addition to the characters given in the table. 



Grinita seems to be comparatively limited in range, all the speci- 

 mens which I have seen being from Southern California. The 

 following is allied to crinita : — 



P. diffracta n. sp. — Oval, strongly convex, piceous-black, polished, the 

 vestiture consisting of very narrow, extremely sparsely scattered scales inter- 

 mingled with longer erect hairs on the pronotum, the latter trivittate, each 

 elytron with a very narrow sutural and three discal vittse of denser white 

 scales, also a short humeral vitta which is more or less evanescent, but some- 

 times prolonged, the elytral vittae more or less disintegrated and uneven. 

 Head coarsely, densely punctate, the clypeus broadly reflexed, extremely 

 broadly, feebly bisinuate at apex and very densely clothed with yellow squa- 

 mose pubescence. Prothorax twice as wide as long, the apex broadly emargi- 

 nate and much narrower than the base ; sides broadly subangulate ; lateral 

 vitta interrupted anteriorly. Elytra about three times as long as the protho- 

 rax, and, in the middle, one-third wider than the latter, rather finely, sparsely 

 punctate and subrugulose. Pygidium slightly wider than long, very densely 

 squamulo-pubescent except toward the sides, where it is very sparsely so, also 

 with a subdenuded median line. Length 21.0-24.0 mm. ; width 10.3-11.3 mm. 



New Mexico (probably near Las Vegas). 



The two specimens before me are males ; there is another in the 

 cabinet of Mr. Jiilich in which the elytral vittae are still more dis- 

 integrated. The antennal club of the male is still somewhat smaller 

 than in crinita. 



Subvittata and hammondi of LeConte are easily distinguishable 

 from each other by the antennal character separating decimlineata 

 and crinita. The male club in svbvittata is fully three times as 

 long as the stem, and in hammondi but slightly more than twice as 

 long as the latter ; there are differences also in the general character 

 of the elytral ornamentation, form of the clypeus, size and other 

 characters, showing that the two species are without doubt dis- 

 tinct. Mr. Dunn, who has taken both of them abundantly, states 

 that they are never found together. 



THYCE Lee. 



With increased care in collecting, the species of this interesting 

 genus are becoming somewhat numerous on the Pacific coast, where 

 they replace Lachnosterna to some extent. The species appear to 

 be more nocturnal than crepuscular in habit, and, although proba- 



