172 MEMOIRS ON THE COLEOPTERA 



Teliusa malaca n. sp. Similar to alntacea in coloration, dense opacity 

 and very fine dense punctures and pubescence throughout the body, 

 legs and antennae; head but little wider than long, very nearly as wide 

 as the prothorax, the eyes rather large and prominent, at nearly three- 

 fourths their length from the base, the tempora less prominent, straight 

 and parallel for one-half their length, then strongly oblique to the base; 

 antennae pale, long, very slender, gradually, feebly incrassate distally, 

 the second joint slightly longer than the first and distinctly longer than 

 the third, two to four uniformly and rapidly decreasing in length, four 

 to six slowly decreasing but barely thicker, from two-thirds to one-half 

 longer than wide, seven to ten more obtrapezoidal, gradually widening 

 from two-fifths longer than wide to as long as wide, the last as long as 

 the two preceding; prothorax just visibly wider than long, widest and 

 with rather prominently rounded sides at apical fourth, the sides thence 

 feebly converging and subsinuate to the base, the median line rather 

 strongly impressed basally, obsoletely anteriorly ; elytra transverse, nearly 

 one-half wider and not quite a third longer than the prothorax, the 

 humeri well exposed at base; abdomen much narrower than the elytra, 

 parallel basally, gradually tapering posteriorly, the fifth tergite more 

 than one-half longer than the fourth. Length 2.0 mm.; width 0.48 mm. 

 Texas (Del Rio), Wickham. 



Differs from alutacea in its smaller size and more slender form, 

 particularly the more slender abdomen with less arcuate sides, 

 distinctly smaller and less prominent eyes and in certain details 

 of antennal structure, the antennae in alutacea being slightly longer 

 and still less incrassate distally, with the third joint less distinctly 

 shorter than the second and the fourth fully twice as long as wide. 



Tachyusa Erichs. 



A genus of slender graceful Staphylinids, rather well developed 

 in subarctic North America from the Atlantic to the Pacific; this 

 continent, however, does not appear to possess any species of the 

 Caliusa type. 



Tachyusa virginica n. sp. Slender, shining, pale testaceous, the head 

 but slightly darker, the fourth tergite and most of the fifth blackish; 

 punctures minute and sparse throughout, the three tergitical impressions 

 coarsely, very densely punctate, the medial carina indistinct; pubes- 

 cence rather long and distinct; head very nearly as wide as the prothorax, 

 nearly as long as wide, the eyes prominent and at a little more than their 

 own length from the base, the less prominent tempora at first feebly 

 converging, then gradually broadly arcuate and more converging to 

 the base; antennae long and very slender, pale brown, still paler basally, 

 only feebly and very gradually incrassate, the first three joints subequal 

 in length, fourth and fifth twice as long as wide, ninth slightly elongate, 



