788 FAMILY XXXIX. BUPRESTIM5. 



VIII. CHRYSOBOTIIRIS Eseh. 1829. (Or., "gold + a pit.") 



A large genus of rather broad and flattened beetles, small or 

 medium in size and having the antenna? inserted at the inner end 

 of short oblique grooves by which the front is narrowed; mentum 

 horn-like at base, membranous at apex ; prosternum acutely angu- 

 lated on the sides behind the coxre and acute at tip ; scutellum large 

 and acuminate; front femora strongly toothed; first joint of hind 

 tarsi always as long as the next three, often much longer. 



The principal paper treating of the genus is by 



Horn. "A Monograph of the species of Chrysobothris inhabit- 

 ing the United States," in Trans. Amer. Ent. Soc., XIII, 

 1886, 65-124, pis. II-VII. 



The following species have been taken or may occur in the State : 



KEY TO INDIANA SPECIES OF CHRYSOBOTHRIS. 



(i. Side margins of last ventral segment with fine teeth. 

 b. Disk of thorax even, without pits or elevations. 



c. Sides of abdomen densely punctate and clothed with fine recumbent 



white pubescence; sides of thorax narrowing to base; elytra with 

 first costa faintly indicated and with indistinct fovea? on the disk. 



DEBILIS. 



cc. Abdomen sparsely punctate and not pubescent; sides of thorax 



straight and almost parallel; elytra without trace of costa 1 or 



t'ovea? ; color blue or green, with a median purple black stripe, 



surface shining. 1499. PURPUREOVITTATA. 



l>l). Disk of thorax irregular, median line more or less sulcate, often with 



small elevations. 



d. Front tibia? of male curved and with numerous fine teeth on the 



inner edge ; clypeus acutely notched at middle, seniicircularly 



curved on each side. 1500. FEMORATA. 



dd. Front tibia? of male curved but with not more than one tooth on 



inner side ; clypeus not as above. 



e. Front tibia? of male with a single acute tooth one-third from 

 apex ; clypeus with a short truncate median lobe. 



1501. FLORICOLA. 

 ce. Front tibiae of male dilated at tip and without teeth. 



/. Prosternum without trace of lobe in front; color dark bronze; 



disk of thorax with median groove. 

 g. Joints 4 to 11 of antenna? more or less brownish-yellow. 



DENTIPES. 



(Hi. Joints of antennae wholly metallic bronzed; hind tibia? 

 straight in both sexes. TRINERVIA. 



//. Prosternum distinctly lobed in front, the lobe short. 



h. Median groove of thorax well marked, the elevated smooth 

 spaces conspicuous; front tibia of male abruptly dilated 

 at tip; first elytral costa sinuous, especially near apex; 

 length 10-12.5 mm. 1502. BLANCHARDI. 



