788 



FAMILY XXXIX. BUPRESTID/E. 



VIII. Chrysobothris Esch. 1829. (Gr., "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 coxae 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.— 1 ' 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. 



a. Side margins of last ventral segment with fine teeth. 

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



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

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

 first costa faintly indicated and with indistinct foveae on the disk. 



DEBILIS. 



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

 straight and almost parallel; elytra without trace of costae or 

 foveae; color blue or green, with a median purple black stripe, 

 surface shining. 1499. pu hp u reo v ittata.' 



bb. Disk of thorax irregular, median line more or less sulcate, often with 

 small elevations. 



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

 inner edge; clypeus acutely notched at middle, semicirculaiiy 

 curved on each side. 1500. femorata. 



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

 inner side ; clypeus not as above. 

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

 apex; clypeus with a short truncate median lobe. 



1501. FLORICOLA. 



ee. 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 antennae more or less brownish-yellow. 



DENTIPES. 



gg. Joints of antennae wholly metallic bronzed; hind tibiae 

 straight in both sexes. trinervia. 

 ff. 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. 



