656 



FAMILY XXVII. L AT HTvIDIIDyE . 



66. Thorax but slightly narrower than elytra. 



c. Eyes minute, situated, at about their own length from the hind 

 angles of the head. 



d. Elytral intervals 3, 5, 7 higher than the others. costulata. 



dd. Elytral intervals subequal ; form more narrow. filifokmis. 



ce. Eyes much larger, occupying the hind angles. aegus. 

 aa. Antennal club two-jointed ; thorax with a large rounded fovea on front 



of disk. FILUM. 



1259 (3786). Cartodeee euficollis Marsh., Ent. Brit., I, 111. 



Elongate, slender, subconvex. Pale reddish-brown, elytra darker. An- 

 tennal club rather abruptly three-jointed, its first joint large, orbicular; 

 second less thick, elongate-oval ; third small and subglobular. Thorax sub- 

 cordiform, sides rather strongly rounded in front of middle, deeply con- 

 stricted, near base ; surface densely and rather finely punctate. Elytra 

 elongate-oval, each with seven rows of coarse, closely-set punctures; inter- 

 vals narrow, very feebly convex except the sixth, which is more prominent. 

 Length 1-1.3 mm. 



Howard County; frequent locally about a barn. June 24. An 

 introduced species widely distributed throughout the United States. 



C. costulata Reitt. and C. filiformis Gyll., both reddish-yellow 

 and 1-1.5 mm. in length, are known from Michigan and near Cin- 

 cinnati ; C. argus Reitt. and C. filum Aube, also dull reddish-yellow, 

 length 1.3 to 1.6 mm., range from Canada, Michigan and westward. 



Tribe II. CORTICARIINI. 



This tribe has the thorax without distinct sculpture, its sides 

 more or less crenulate or denticulate, the disk with nearly always a 

 rounded or transverse impression before the base ; front coxae 

 usually continguous or nearly so ; abdomen with five or six ventral 

 segments; elytra without costse but with hairs arranged in rows. 

 Three genera compose the tribe, two of which are represented in 

 Indiana. 



KEY TO INDIANA GENEEA OF CORTICARIINI. 



a. Abdomen of female with five segments, a sixth usually visible in the 

 males; form more elongate. IV. Corticaria. 



aa. Abdomen of both sexes with six segments, except in picta, where the 

 male has but five; form more oval. V. Melanophthalma. 



IV. Corticaria Marsh. 1802. (Lat., "bark.") 



Small elongate or oblong-ovate species having the pubescence 

 more or less long and conspicuous, that on the elytra arranged in 

 rows ; eyes large and rather prominent ; antenna? usually not quite 

 reaching the hind angles of thorax, 11- jointed, the club 3-jointed; 

 thorax usually subcordate, w 7 ith front and hind angles obtuse, sur- 



