THE METALLIC WOOD-BORING BEETLES. 



793 



KEY TO INDIANA GENERA OF JULODINI. 



a. Scutellum indistinct; side pieces of metathorax partly visible. 



X. ACM.EODERA. 



aa. Scutellum visible; side pieces of metathorax covered by the elytra. 



XI. Ptosima. 



X. AcMiEODERA Esch. 1829. (Gr.. "in full bloom + skin.'/) 



This genus, as characterized above, is represented in the United 

 States by 70 species, only three of which occur in the eastern United 

 States, including Indiana. The others are found mostly in the 

 Southwestern and Pacific States. The two principal papers treat- 

 ing of the genus are by 



Horn. — "Revision of the Species of Acmaeoclera of the United 



States," in Trans. Amer. Ent. Soc, VII. 1878, 2-27, PL I. 

 Fall, If. C. — "Synopsis of the Species of Acmseodera of America 

 North of Mexico," in Journ. N. Y. Entom. Soc, VII, 1899. 

 1-37. 



KEY TO INDIANA SPECIES OE ACMiEODERA. 



a. Sides of thorax with an elongate yellow spot near hind angles. 



1507. PULCHELLA. 



aa. Sides of thorax without trace of yellow. 



1). Larger, 8.5-11 mm. ; bluish-black, elytra with a number of small, 

 more or less connected yellow spots. 150S. obnata. 



hlj. Smaller, 5-7.5 mm. ; blackish-bronzed, spots smaller, distinctly sej> 

 arated and usually in two rows. 1509. tubules, 



1507 (4699). ActoiEODERA pulchella Herbst, Col. IX, 1805, 211. 



Elongate-oblong or subcylindrical, convex. Thorax and under surface 

 bronzed, the former with an oblong yellow spot in front of hind angles ; 

 elytra black with variable yellow markings, these usually a small sub-basal 

 spot, an elongate marginal spot reaching from humerus to beyond middle, 

 this with an inward prolongation near middle, and two crossbars, inter- 

 rupted at suture, on apical third. Thorax convex, nearly twice as wide as 

 long, apex and base truncate, sides narrowing from base to apex; disk with- 

 out distinct impressions, but with a small basal fovea on each side ; surface 

 densely, evenly and rather coarsely punctured. Elytra as wide at base as 

 thorax, margin serrate ; surface striate, the striae rather finely punctured ; 

 intervals flat, each with a single row of punctures, bearing short brownish 

 hairs. Length 5.5-10 mm. 



Throughout the State ; frequent. June 11-July 25. Occurs on 

 flowers, especially those of Jersey Tea. Ceanoinus americanus L. 

 The yellow spot on side of thorax is sometimes reduced to a mere 

 point and in one specimen at hand is wholly lacking. 



