MYCETOPHAGID/E 173 



the legs still paler; head more than half as wide as the prothorax, some- 

 what closely punctured and pubescent; antennae thick, gradually nar- 

 rowed basally, longer than the head and prothorax (c?) and with the 

 fourth joint distinctly shorter than the third, though slightly elongate, the 

 color piceous-black, gradually pale basally and with the last joint also 

 pale as usual; prothorax fully twice as wide as long, of the usual form, the 

 punctures distinctly separated by the shining interspaces, the subbasal 

 pits deep; elytra barely one-half longer than wide, at base as wide as the 

 prothorax, at, or rather behind, the middle, slightly wider, the sides 

 broadly and feebly arcuate, the apex gradually very broadly rounded; 

 striae feebly impressed and with rather small and feeble punctures, the 

 intervals finely and densely punctate, scarcely at all shining; under surface 

 densely punctulate. Length (c? 9 ) 3.1-4.2 mm.; width 1.6-1.85 rnm. 

 North Carolina (Southern Pines and Asheville). Three examples. 



Differs from subdepressus, which it resembles almost exactly in 

 outline, in its immaculate elytra, excepting the humeral and apical 

 spot on each, and in its shorter fourth antennal joint of the male; 

 in the male of subdepressus, from Indiana, the fourth joint is equal 

 in length to the third. In one specimen of quadralius, there are 

 two very small submedial spots on the left elytron but none on the 

 righ t ; one of these spots is near inner third slightly behind the middle, 

 the other at three-fifths from the base and outer two-fifths. The 

 male is smaller than the female. 



Mycetophagus tribalteatus n. sp. Body narrower than in the preceding 

 and less punctate, the surface shining, black, the elytra each with a large 

 quadrate humeral spot, with a very small one near it internally and 

 posteriorly and sometimes attached to the large spot, also, at three-fifths 

 from the base, a slightly oblique transverse fascia, not quite attaining the 

 sides and still more widely separated from the suture, its hind margin 

 bisinuate or with two obtuse projections and, finally, a subapical spot, 

 attaining the sides but not quite reaching the suture, the spots of pale 

 flavo-testaceous tint; under surface blackish-piceous, gradually paler 

 posteriorly, the legs brown; head three-fifths as wide as the prothorax, 

 rather closely punctate, the eyes large and prominent; antennae as in the 

 preceding but paler; prothorax similar but not quite so short; elytra 

 rather more than one-half longer than wide, at the middle barely at all 

 wider than the prothorax, circularly rounded behind; striae more coarsely 

 and deeply impressed and somewhat more strongly punctured, the inter- 

 spaces more convex and much less closely punctured, shining; under 

 surface closely punctate, the abdomen more finely and still more densely 

 than the sterna. Length (9) 3-75 mm.; width 1.65 mm. North Caro- 

 lina (Southern Pines), Manee. 



This species differs from both subdepressus and quadralius in the 

 narrower and relatively more elongate form and less punctured and 

 more shining elytra; from the latter it differs in maculation, but 



