THE GKOUND BEETLES. 171 



313 (1039). LACHNOCEEPIS PARALLELUS Say, Trans. Amer. Phil. Soe., IV, 



1834, 420 ; ibid. II, 532. 



Elongate-oblong, parallel, subconvex. Black, shining, very finely alu- 

 taceous ; antenna? piceous, two basal joints paler ; legs and region of hind 

 angles of thorax reddish-brown, the latter translucent. Thorax slightly 

 wider than long, widest a little behind the middle; apex narrower than 

 base, the latter as wide as elytra ; disk not punctured ; hind angles obtuse. 

 Elytra seven-striate, the strife parallel their full length, finely and distantly 

 punctate; intervals subconvex, smooth. Length 9.5-10.5 mm. 



Lake and Koscinsko counties; scarce. May 6-October 29. Oc- 

 curs near water. 



LIX. AXATRICHIS Lee. 1853. (Gr., "without + hair.") 



Small oval or oblong black or piceous beetles, separated from 

 allied genera by the characters given in the key. One species oc- 

 curs in Indiana. 



314 (1040). ANATRICHIS MINUTA Dej., Spec. V, 1829, 677. 



Oval, broader behind. Black, shining; antennae piceous, the basal joints 

 and legs reddish-brown. Base of thorax as wide as elytra; sides feebly 

 curved, converging gradually to apex; disk finely not densely punctate; 

 basal impressions deep, short. Elytral striae deep, serrately punctate; in- 

 tervals flat, minutely punctulate. Length 5-6 mm. 



One specimen taken in Posey County. April 9. A member of 

 the Austroriparian fauna. 



LX. OODES Bon. 1813. (Gr.. " egg + form.") 



Small or medium sized, oval or oblong, black or greenish-black, 

 shining beetles, resembling closely certain forms of the genus 

 Amara. All have the thorax as wide at base as elytra, and the 

 third interval of latter with two dorsal punctures behind the 

 middle. They occur, for the most part, beneath stones, etc., along 

 the margin of lakes and ponds. Five species have been taken in 

 the State. 



KEY TO INDIANA SPECIES OF OODKS. 



a. Elytra with seven strife equally distinct; first joint of front tarsi of 



male entirely spongy beneath. 



6. Thorax broadest at base: length 7.5-9 mm. 315. AMAROIDES. 



66. Thorax broadest just in front of base ; length 12.5 mm. 



c. Elytral strife distinctly and closely punctured; form very broad. 



316. AMERICANUS. 



re. Elytral strife finely and distantly punctured; form more narrow. 



317. FLUVIAIJS 



