THE SHOET-WINGED SCAVENGEn BEETLES. 



359 



broadly curved, hind angles obtuse and blunt; disk alutaceous, very finely 

 and sparsely punctate, sometimes with a fine median impressed line. Ely- 

 tra slighily wider and longer than thorax, finely, distinctly and densely 

 punctate. Abdomen slightly narrower than elytra, polished. Length 3 mm. 



Putnam County; rare. Octoher 17. Described from Indiana 

 and New York. 

 083 (9533). Zybas planifek Casey, Ann. N. Y. Acad. Scl., VII, 1893, 32fl. 



Rather stout, subparallel. Dark reddish-brown, shining, the elytra 

 darker except on humeri ; abdomen black, the first three segments in part 

 or wholly pale; legs and base of anrennte pale reddish-brown. Antennae 

 reaching middle of elytra, the third joint twice the length of second, ob- 

 conical. Thorax one-half wider than long, widest at apical third, sides 

 straight on basal half, disk convex, finely and sparsely punctate and with 

 a faint median impressed line. Elytra two-fifths wider and slightly longer 

 than thorax, rather coarsely and roughly punctate. Abdomen one-fourth 

 narrower than elytra, parallel, smooth or nearly so. Length 3-3.5 mm. 



Putnam, Lawrence and Crawford counties ; scarce, ilareh 20- 

 May 25. The thorax of male has a large flattened median area and 

 is more coarsely punctate than in female. 



XXI. Xenodusa Wasm. 1894. (Gr., "strange + guest.") 



Robust brown species having the antennre very slender, head 

 small; thorax wider than elytra, the sides much elevated; abdomen 

 as broad as elytra, parallel, the first four or five dorsal segments with 

 tufts of yellow hairs on the sides. 

 684 (2041). Xenodosa cava Lee, N. Sp. N. Am. Col., I, 1863. 30. 



Elongate, robust, parallel. 

 Eeddish-brown, shining, 

 sparsely pubescent. AntenuiO 

 reaching middle of abdomen, 

 the third joint twice the length 

 of second. Thorax nearly four 

 times as wide as long, sides 

 broadly reflexed, hind angles 

 acute, much prolonged, base 

 bisinuate, disk minutely and 

 indistinctly punctate. Elytra 

 one-half narrower and slightly 

 longer than thorax. Length 

 5-6 mm. (Fig. 155.) 



Throughout the State; 

 scarce. April 25-August 

 17. Occurs in the nests of 

 s(-veral kinds of ants. 

 Usually but two or three 

 of the beetles are found at Kg. iss. (Original.) 



