THE FEATHER- WINGED BEETLES. 



487 



Nanosella fungi Lee, elongate, reddish-yellow, legs and anten- 

 na 1 paler, length .3 of one mm., has been taken near Cincinnati. It 

 is the smallest of North American beetles and occurs in powdery 

 fungi. Ptilium collani MakL, oblong, pitchy-black, length .7 of 

 one mm., may also occur. 



II. Ptenidium Erichs. 1845. (G-r., '''provided with Little 



feathers. ") 



Small elongate or oblong-oval species having the club of an- 

 tenna? formed of three joints; thorax small, narrower at base than 

 middle; elytra entire, concealing all seven segments of the abdo- 

 men; metasternum large, quadrate, extending to the sides of the 

 body. Two have been taken in the State, and another may occur. 



KEY TO INDIANA SPECIES OF PTENIDIUM. 



a. Thorax with two distinct fovea? on each side near the base ; color pale 

 chestnut brown. foveicolle. 

 (id. Thorax with but one fovea on each side at base, or none. 



1). Color black, shining, the tips of elytra yellowish. 935. pusillttm. 

 bb. Color dull yellow, shining; elytra each with two blackish stripes. 



936. LINEATUM. 



935 (2929). Ptenidium pusillum Gyll., Ins. Suec, I, 1808, 1S9. 



Rather broadly ovate, convex. Black or piceous, shining, very sparsely 

 clothed with long whitish hairs ; tips of elytra more or less widely reddish- 

 yellow ; legs and antenna? dull yellow, the club of the latter dusky. Thorax 

 much wider than long, widest just behind the middle, sides rounded, hind 

 angles obtuse ; disk deeply and sparsely punctured and with a deep trans- 

 verse impression each side at base near the angles. Elytra ovate, widest 

 before the middle, with very fine remote punctures in rows. Length 1- 

 1.5 mm. 



Putnam County; rare. March 25. Taken by sifting dead leaves. 



936 (2934). Ptenidium lineatum Lee. N. Sp. N. Amer. Col., I. 1863, 63. 

 Elongate-oblong, convex. Color given in key. Thorax slightly wider 



than long, a little narrower at apex than base, very finely punctate. Ely- 

 tra oval, sparsely clothed with fine silken hairs. Length .4 mm. 



Clark County; rare. May 6. Taken from fungi on beech log. 

 A member of the Austroriparian fauna. 



III. Limulodes Matthews. 1867. 



One small reddish species belongs here. It has the antenna? very 

 short and thick, joints 1 and 2 large, 8-6 very small. 7-9 very large 

 and forming an elongate club; head small, deiiexed ; elytra trun- 

 cate, short and narrowed toward the apex; abdomen short, with six 



