64 MEMOIRS ON THE COLEOPTERA. 



Tribe MYRMEDONIINI. 



Tinotus Sharp. 



This is a moderately large genus, characteristically American, 

 and distributed throughout the temperate parts of the North 

 American continent, excepting apparently the true Pacific coast 

 fauna, from which region I have as yet seen no representative. 

 There are two groups of species, represented by caviceps and 

 imbricatus . 



Group I Type caviceps Csy. 



In this group the abdomen has no ground sculpture, and each 

 puncture has two strong and subparallel conspicuous and approxi- 

 mate lines of considerable length, extending posteriorly therefrom; 

 in caviceps and paratus the size is larger than usual and the head of 

 the male is deeply concave nearly throughout the extent of its upper 

 surface. The following is allied to caviceps: 



Tinotus paratus n. sp. Stout, subparallel, rather convex, feebly 

 shining and very finely but strongly micro-reticulate, the abdomen strongly 

 shining and without sculpture, excepting the long bilineiform punctures; 

 pubescence short, not dense, very coarse, palish, longer and bristling 

 along the segmental apices of the abdomen; color piceous-black, the 

 elytra faintly rufescent, the legs dark, paler distally; head three-fifths 

 as wide as the prothorax, parallel, wider than long, the eyes rather small, 

 feebly convex and very finely faceted; antennae rather short, stout, 

 gradually strongly incrassate, compact and thick distally, black, paler 

 basally, the third joint as long as the first but a little thinner and ob- 

 conic, much longer than the second, fourth quadrate, the outer joints 

 nearly twice as wide as long, the last ovoidal, obtuse, as long as the two 

 preceding; prothorax nearly twice as wide as long, strongly rounded at 

 the sides and widest rather before the middle (cf), or at the middle (9 ), 

 the sides straighter basally (cf) but evenly rounded (9 ); apex but little 

 narrower than the base, which is rounded and with obtuse but distinct 

 angles, the punctures strong and somewhat rough though not dense, the 

 surface very convex, with a large median depression from apex to near 

 the base (c?), or evenly convex and with a fine, faintly impressed median 

 line vanishing basally (9); elytra transverse, parallel, rather convex, 

 strongly and roughly punctate, the suture fully as long as the prothorax 

 (cT), or a little shorter (9 ), the apices broadly sinuate externally, the 

 flanks not projecting posteriorly so far as the inner parts of the apex; 

 abdomen almost as wide as the elytra, parallel, narrowing slightly pos- 

 teriorly, the margins notably thick; hind tarsi long, the basal joint equal 

 to the next two. Length 2.4-3.0 mm.; width 0.8-0.95 mm. Montana 

 (Kalispell), YVickham. 



