THE SHORT- AVTXGE1> S< ' A Y K.\ <i KI! UKETLES. 415 



The following papers treat of the North American species of the 

 subfamily : 



LeContc. "Synoptic Tables of Lathro'bium, Stilicus and 



Sunws," in Trans. Amer. Ent, Soc., VIII. 1880. 174-180. 

 LcCoiitc. "Synoptic Tables of Cryptol)inm, Paderus and Pala- 



minus," in Proc. Amer. Phil. Soc.. XVII, 1878. 390-397. 

 Horn. "A Study of the Species of Cryptobium of North Amer- 



ica," in Trans. Amer. Entom. Soc.. XII. 1884. 85-100. 

 Cast i/. : 'A Revision of the American I'jvderini," in Trans. 



Acad. Sci. St. L.. XV. 1905. 17-24S. 



As above defined. Hit- subfamily is rcpivscnled in Indiana by 

 I \vo 1 ribos : 



KEY TO INDIANA TRIBES OF P^EDEKI N.10. 



a. Last joint of maxillary palpi very small, awl-shaped. 



Tribe I. IVEDERINI, p. 4ir. 



IKI. Last joint of maxillary palpi as largo as the Iliird, obliquely hatchet- 

 shaped. Tribe II. PINOPIIILINI, p. 4-10. 



Tribe I. PyKDERINI. 



This tribe as above limited is composed of a large number of 

 genera, the following of which are known to occur in Indiana: 



KEY TO INDIANA GENERA OF P^EDERINI. 



a. Fourth joint of hind tarsi not lobed beneath. 



b. Antenna? elbowed at the end of the long basal joint; front tarsi not 



dilated. 



c. Mandibles each with three teeth on the inner side ; males with last 



ventral not notched, the second and third ventrals each with a 



fold or pit at middle. XLIII. CRYPTOBIUM. 



cc. Mandibles each with two teeth: males with the last ventral 



notched, the second and third without folds or pits. 



XLIV. HESPEROBIUM. 



l>l). Antenna? straight or nearly so, the basal joints not greatly elongated. 

 <1. Prosternum shortened between and under the front coxa?, ending 



in an acute point which does not reach the niesosternmn. 

 e. Labrnm bilobed: sculpture never very dense, the surface more 

 or less shining; front tarsi strongly dilated in both sexes; 

 ligula bilobed at tip. XLV. LATHROBIUM. 



ee. Labi-urn with a distinct median tooth ; sculpture very dense, the 

 surface subopaque ; front tarsi variable; lignla with a dense 

 fringe of hairs at tip. 



f. Front tarsi moderately dilated, densely padded beneath; first 



joint of hind tarsi one-half longer than second; length 



6.5 mm. XLVI. ADERO<'IIAKIS. 



if. Front tarsi not dilated; first joint of hind tarsi only slightly 



longer than second ; length 3.7 mm. LITHOCHARIS. 



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