236 MEMOIRS ON THE COLEOPTERA 



Tribe MYLL/ENINI. 

 Myllaena Erichs. 



The sexual characters in this genus are much feebler than in 

 Deinopsis, the sixth ventral plate being simply a little more trun- 

 cate in the female than in the male as a rule, the sixth tergite 

 angulate in both sexes. It differs primarily from the two other 

 genera of the subfamily in the tarsal structure, the joints being 

 4-4-5 in number, with the first joint of the posterior elongate though 

 not as much so as in Gymnusa. The species are numerous and are 

 somewhat local, no two being common to the two sides of the 

 continent so far as can be observed ; this therefore makes a conve- 

 nient division for purposes of description. The species described 

 by Kraatz, from Louisiana, under the name fuscipennis is unknown 

 to me; it has been identified with the European minuta Grav., but 

 in all probability erroneously. None of the three European species 

 now before me gracilis, brevicornis and gr&ca, can be recognized 

 among my American material. The two species fenyesi and 

 vulpina, of Bernhauer, are not represented in my collection appar- 

 ently. 



Myllaena insomnis n. sp. Rather stout, convex, dull in lustre, black, 

 the fine dense decumbent hairs palish, the legs pale brown; punctures 

 very fine and dense throughout; head small, convex; antennae (cf ) long, 

 very slender, blackish, the basal joint stouter, pale and not twice as 

 long as wide, the second very long, slender, much longer than the third, 

 the outer joints not incrassate, all much longer than wide, the last one- 

 half longer than the tenth, the antennae shorter and more incrassate 

 distally in the female; prothorax more than twice as wide as the head, 

 barely one-half wider than long, the sides very evenly and moderately 

 arcuate and converging from base to apex, the base broadly arcuate, 

 sinuate laterally, the basal angles slightly prominent posteriorly and 

 right; elytra parallel, equal in width to the prothorax and but little 

 shorter, the lateral sinuses at apex unusually feeble; abdomen at base 

 slightly narrower than the elytra, very strongly tapering, the fifth 

 tergite barely one-half as wide as the base, the sixth with the apical 

 angulation very acute and fully as long as its basal width (cf). Length 

 2.3 mm.; width 0.7 mm. Massachusetts, Blanchard. 



Distinguishable readily by the well developed elytra, having 

 the apical sinuses unusually feeble, by the dull lustre, very tapering 

 abdomen and other characters as noted above. 



Myllaena audax n. sp. Similar in general outline and convexity but 

 larger and a little stouter, paler brown in color, the pronotum slightly 



