498 FAMILY XIV. PIIALACRIDai. 



Of these nine species, belonging to five genera, have been taken in 

 Indiana, while one additional genus and two species may occur. 



KEY TO INDIANA GENERA OF PHALACRID.E. 



o. Antennae inserted under the sides of the front, their base entirely con- 

 cealed from above; scutellum large; front and hind tarsi of the same 

 length; spurs of hind tibiae very short. I. PHALACRUS. 



aa. Antenna? inserted at the sides of the front, their base visible from above; 



scutellum small or moderate ; hind tarsi elongated. 

 &. Basal joint of hind tarsi shorter than the second joint. 



c. Apex of prosternal spine inflexed, without an acute and free edge; 

 elytra with one or two discal strhe. the suture beaded; second 

 joint of hind tarsi of moderate length. II. OLIBRUS. 



ce. Apex of the prosternal spine with an acute free edge, and bearing 

 a transverse row of spinules ; elytra with a single discal stria, 

 the suture not beaded. 



d. Second joint of hind tarsi elongated, very much longer than first 



joint, spongy pubescent beneath in male; hind tibial spurs long, 



very unequal. III. ACYLOMUS. 



dd. Second joint of hind tarsi moderate, not more than twice as long 



as first, finely pubescent beneath in both sexes; hind tibial 



spurs small and inconspicuous. IV. ErsriLBrs. 



1)1). Basal joints of hind tarsi longer than second; elytra with two discal 



striae. 



c. Prosternal spine inflexed at apex and without terminal spinules; 



basal joint of hind tarsi much longer than all the other joints 



together. LITOCHBUS. 



ee. Prosternal spine not inflexed, the edge free and acute; basal joint 



of hind tarsi subequal in length to the next two together. 



V. OCHROLITUS. 



I. PHALACRUS Payk. 1798. (Gr., "bald + head.") 



Besides the characters above mentioned, the members of this 

 genus have a single discal stria on each elytron and the head is 

 marked with four or five minute foveae each side near the eye. 



*'.r>5 (2903). PHALACRI-S POIJTI'S Melsh.. Proc. Phil. Acad. Nat. Sci.. II, 



1S44, 102. 



Broadly oval. Black, moderately shining: legs and antenna^ paler. An- 

 tennae slender, the third joint equal in length to the two following united. 

 Thorax twice as wide at base as apex, feebly reticulate in wavy lines, very 

 finely and sparsely punctate. Elytra not narrowed toward tips, which are 

 very broadly and evenly rounded; sutural stria complete, very fine; discal 

 stria fine, distinct; disk with rows of fine, feeble punctures. Metasternal 

 process wide, rounded at apex and projecting far in advance of middle 

 coxae; prosternal process nearly one-half as wide as metasternal. Length 

 1.8-2.2 mm. 



