978 FAMILY L. — scaeab,t;id.i<:. 



1831 (10,258). Lachnosterna delata Horn. Trans. Amer. Ent. Soc, XIV, 

 1SS7, 2G7. 

 Oblong:, slightly broader behind. Piceous brown, head and thorax more 

 shining; sparsely clothed with short, semi-erect grayish hairs. Clypeus 

 rather deeply and broadly emarginate, its surface densely and coarsely 

 punctate. Thorax with mai'gin subcrenate and ciliate ; surface with coarse, 

 deep punctures not closely placed, each with a short, semi-erect hair. Ely- 

 tra finely and rather closely punctate, the cost;e indistinct. Male with ab- 

 domen feebly flattened at middle, the fifth segment broadly and rather 

 deeply depressed liehind the middle, willi an (ilili(iue fold each side; last seg- 

 ment acutely notched at apex and with a shallow concavity marked with a 

 longitudinal line. Length 1.5-17 mm. (Tl. Ill, fig. 392.) 



Orange County ; rare. May 28. Two specimens taken at elec- 

 tric light. Knciwn only from Kentucky and Illinois. Resembles 

 hirsnta but mere oval, less hairy and with lO-jointed antenna\ 



1S32 (5777). Lachnosterna ilicis Ivnoch.. Xeue Beytrage zur Insect, 

 ISOl, 79. 

 Oblong, slightly broader behind. Brown, more or less opaque; head pic- 

 eous; elytra pruinose. Clypeus rather deeply emarginate. surface very 

 densely and coarsely punctured. Thorax widest at middle, slightly nar- 

 rowed at base, side margins crenate and ciliate; surface densely gi'anulate- 

 punctate, covered with a rather close, recumbent pubescence ; usually with 

 a slightly elevated smooth median line. l<]lytra densely punctate and finely 

 rugulose; discal costa? indistinct, submarginal moderately distinct. Male 

 with abdomen flattened at middle, the fifth segment broadly transversely 

 impressed with an oblique ridge each side ; last segment irregularly concave, 

 distinctly emarginate at apex. Length 19-2.".5 mm. (PI. V, fig. 401.) 



Throughout the State ; fiequent. April 22-July 24. Our largest 

 hairy species. 



L. ciliata Lee, length 20-21.5 nun., is known from Wisconsin, 

 Illinois, Missouri and Georgia. 



Group F. 



In this group the spurs of hind tibi;e of male are l)()th free, 

 movable and slender. The species vary much in form and size and 

 comi)rise the Indiana species of Groups XII, XV, and XVI of 

 Iloi-n. Tln-ee liave been taken in the State, while two others per- 

 liaps occur. 



KK'>- TO SPECIES OE GROUP E. 



a. Anteniue lO-jointed: Ixidy more or less hairy. 



h. Clypeus more or less emarginate, extended on to the eye at base. 

 c. Margin of thorax sti'ongly crenate : pubescence of upper surface 

 yeliowisn. 1.S33. crenulata. 



re INIargin of thorax ciilii-c: iHibcsccncc I'.-idicr dense, white. 



1834. AUilNA. 



