JU Bulletin No. 159 



clinging to the undersides of rocks in swift water. Head 

 withdrawn in thorax up to the eyes. Thorax with sides 

 rounded, anterior lateral angles acute, projecting forward 

 as a spine alongside each eye. Wing covers contracted and 

 sloping rapidly behind the middle, meeting behind in an 

 acute angle. Surface evenly clothed with fine appressed 

 silky pubescence. Antennae, palpi and tarsi .reddish. Legs 

 in the main black. Length 4.3 — 4.4 mm.; diameter 2 mm. 

 The most common and generally distributed species in 

 Straight Creek and Cumberland River. 



Dry ops fastigiatus. Say. —This species resembles the 

 preceding in a general way and is of about the same size. 

 Black, rather coarsely and unevenly pubescent, the hairs 

 being largely wanting from the region adjacent to the suture 

 of the wing cover, and on the sloping posterior region of the 

 thorax. Head immersed. Prothorax broadly rounded and 

 a trifle angulate behind the middle. Anterior lateral angles 

 slightly apiculate. Pubescence yellow. Legs black; tarsi 

 reddish. Palpi reddish. Antennae short. Length 5 mm; 

 diameter 2.3 mm. 



This insect was found associated with the preceding in 

 Straight Creek, August 29, 1911, and in Cumberland River, 

 August 31, but is relatively rare. 



Stenelmis crenatus, Say. — A small rather slender gray 

 beetle collected August 31, 1911, in the Cumberland River, 

 at Pineville, September 1, in rapids of the Left Fork of 

 Straight Creek, and on September 4, in Benson Creek at 

 Frankfort. Head projecting. Antennas slender, reddish. 

 Prothorax with a rather deep median longitudinal channel 

 bounded by two carinas. Several obscure prominences on 

 each side. Front angles acute, sides rounded behind, con- 

 verging and nearly straight in front. Wing cover dull gray, 

 with a ridge beginning on each side of the scutellum and 

 gradually fading out a little beyond the middle of the 

 elytron. A second decided ridge begins at each humerus 

 and extends posteriorly and a little inwardly, terminating 

 rather abruptly where the posterior slope descends to the 

 tips. Legs gray, tarsi reddish, an obscure red spot between 



