Localities in which Pellagra is Prevalent. ^ 



the ridges of the wing cover and a second at the extremity 

 of the lateral ridge. Length 3.2; diameter 1.4 mm. 



The examples of the species collected in the Left Fork 

 of Straight Creek, September 1, and in Benson Creek at 

 Frankfort, September 24, differ in having the red of the 

 elytra continued to form an obscure stripe. 



Macronychus glabratus, Say. — Black, elongate, shining, 

 punctured. Antenna short, reddish; palpi reddish; distal 

 segment of maxillary palpi black. Thorax elongate, widest 

 behind, sides straight and rapidly converging from an angle 

 behind the middle. Anterior margin pallid, wing covers 

 with an obscure ridge near the suture, fading out beyond 

 the middle. A conspicuous ridge terminates abruptly at the 

 slope behind. Outside the latter ridge, and extending in- 

 ward beyond it, is a silken whitish stripe. Legs long, 

 sprangling, black, tarsi reddish; tibiae with silken pubes- 

 cence within. Pubescence of thorax scattered, golden, a 

 trifle longer and more conspicuous on each side of the 

 median line. A similar line of conspicuous golden pubes- 

 cence on each side of the elytral suture. Length 2.7; 

 diameter 1 mm. 



Next to Dryops lithophilus, the most common species. 

 It occurs in similar situations, but is less generally dis- 

 tributed. Cumberland River, Pineville, August 31; Left 

 Fork Straight Creek, Sept. 1. 



Ancyronyx variegatus, Germ. — This oddly marked beetle 

 was not rare in the waters collected from. Specimens were 

 collected in Clear Creek, August 31, and in the Left Fork of 

 Straight Creek, Sept. 1. 



Head black, exserted, antennae slender, pale yellow, 

 apex black. Thorax wide behind, strongly narrowed in 

 front, and projecting over the head. A broad yellow trans- 

 verse band along the anterior margin. Posterior margin 

 more narrowly and obscurely yellow. Wing covers with a 

 conspicuous bent yellow band beginning at the humerus and 

 extending inward to the suture where it is narrowed, then 

 widening and extending outward nearly to the margin. An 

 elongate yellow spot on each side near the suture on the 



