796 FAMILY XXXIX. BUPRESTDXE. 



(L Body elongate ; prosternuni pointed behind. XIV. Taphroceetjs. 

 (hi. Body broad, ovate ; prosternuni obtuse behind. XV. Brachys. 

 cc. Scutellum large; body triangular; prosternuni very broad, almost 

 truncate behind ; tibire dilated. XVI. Pachyscelus. 



E upristocj&rus cogdans Weber, head and thorax obscure supre- 

 ous. elytra black, with crossbars of grayish hairs, length 8-9 mm., is 

 known from the "Middle, Southern and Western States." 



XIII. Agrilus Steph. 1830. (Gr., "field.") 



Small, slender, elongate forms, having the prosternuni pointed 

 behind ; the scutellum transverse and acuminate. The larva? live in 

 slender stems and twigs of shrubs and trees, and often do much 

 damage, especially to blackberry and raspberry canes. The genus 

 has been monographed by 



Born. — -"The species of Agrilus of Boreal America," in Trans. 

 Amer. Ent. Soc, XVIII. 1891. 277-336, PI. VTTT 



In this paper Horn recognizes 54 species. 18 of which have been 

 taken in Indiana, while several others doubtless occur. On account 

 of the large number of species the Indiana members of the genus 

 are classed in three groups. 



Fig. 307. 1 ( Antenna of Agrilus egenus; 2, of A, imbellis; 3, of .4. obsoletoguttatus; 4, of .4. ra,lcJLs; 5, tarsal 

 claws of A. rujicollis: 6, claws of .4. bilineatus, a, male; b, female; 7, claws of A lecontei, 

 a, male; b, female. (After Horn.) 



KEY TO GROUPS OF INDIANA AGRILUS. 



a. Antennse serrate, beginning at the fourth joint. (Fig. 307. Nos. 3 and 4.) 

 b. Tarsal claws cleft in such a manner that the lower portion is turned 

 inward, nearly or quite touching that of the opposite side. (Fig. 307, 

 No. 5.) Group A. 



bb. Tarsal claws simply cleft, or almost bifid, the lower portions not 

 turned inward. (Fig. 307, Nos. 6 and 7.) Group B. 



aa. Antennae serrate, beginning at the fifth joint. (Fig. 307. Xos. 1 and 2.) 



Group C. 



Group A. 



Whenever the fourth joint of antenna? resembles the fifth more 

 than it does the third (Fig. 307, Nos. 3 and 4), the species comes 



