972 



FAMILY L. SCAEAB^IDJE. 



stem; abdomen flattened at middle, the fifth segment with a semicircular 

 rugnlose elevation in front of a rather deep, smooth depression; last seg- 

 ment vaguely and transversely impressed. Female with pubic process long, 

 deeply forked, the branches truncate at tip. Length 16-20 mm. (PI. II, 

 fig. 386.) 



Lake, Porter, Putnam and Perry counties; scarce. April 22- 

 July 16. Ranges from New York to Illinois and southward. The 

 more slender, oblong body, distinct submarginal costa and coarsely 

 and irregularly punctured thorax should readily distinguish this 

 species. 



L. spreta Horn, oblong, chestnut-brown or fuscous, length 16.5- 

 18 mm., is a rare species described from Maryland and Iowa. 



1823 (5767). Lachnosterna fratebna Harr., Insects Injur, to Yeg., 1841, 29. 



Oblong, scarcely broader behind. Reddish-brown, fuscous or piceous, 

 shining. Clypeus broadly emarginate, its surface densely punctured; front 

 more coarsely and less densely punctured. Thorax gradually narrowed 

 from base to apex, sides feebly curved, margin entire or slightly irregular ; 

 surface rather coarsely and evenly punctured, a narrow median line smooth. 

 Elytral punctures finer and more dense than those of thorax, somewhat 

 rugulose on the sides ; the costse- usually very feeble. Metasternum densely 

 punctured, the hair not long or dense. Male with antennal club equal to or 

 slightly longer than the funicle ; abdomen feebly flattened at middle, ventral 

 ridge as described in key ; last segment deeply concave and smooth. Female 

 with pubic process long, somewhat flattened, expanded at base, the superior 

 plates wholly lacking. Length 15-18 mm. (PI. II, fig. 385.) 



Crawford County; rare. May 21. "Will probably be found to 

 occur throughout the southern third of State. 



1S24 (10,247). Lachnosterna nova Smith, Proc. U. S. Nat. Mus., XI, 18SS, 

 509. 



Oblong, slightly broader behind. Chestnut-brown, shining. Clypeus 

 moderately emarginate, its surface densely and coarsely punctured; front 

 less densely so. Thorax as in f rater na, except as mentioned in key. Ely- 

 tral punctures finer and much more closely placed than those of thorax, the 

 costse feeble but evident. Male ventral surface as in fraterna except as 

 noted in key; the claspers not more than half as large and quite different in 

 structure. (See plate.) Length 14-18 mm. (PI. II. fig. 387.) 



Vigo and Lawrence counties; rare. April 25-July 29. The 

 male is easily distinguished from fraterna by the distinct curved 

 ventral ridge. 



L. knockii Gyll., elongate-oval, reddish-brown to piceous, length 

 21.5-23.5 mm., is said to occur from Massachusetts to Georgia. 



1825 (5774). Lachnosterna rugosa Melsh., Proc. Phil. Acad. Nat. Sci., 

 II, 1844, 140. 



Oblong, rather robust, broader behind. Dark reddish- or chestnut- 

 brown to piceous, shining. Clypeus acutely and rather deeply emarginate, 



