THE METALLIC WOOD-BORING BEETLES. 



789 



hh. Median groove of thorax feeble; ventral segments without 

 lateral smooth spaces, the last one without a submarginal 

 ridge ; length 5.5-7 mm. pusilla. 

 aa. Side margins of last ventral segment without teeth. 



i. Elytra with more or less distinct costae or elevated lines ; disk of tho- 



rax uneven. 



j. Color above dark bronze ; tooth of front femur serrulate. 



1503. SEX- SIGN ATA. 



jj. Color violaceous or coppery; tooth of front femur not serrulate. 



1504. AZUREA. 



ii. Elytra without trace of costae; thorax one-half wider than long. 



1505. SCTTULA. 



C. debilis Lee, dark brownish-bronze, sides of thorax cupreous, 

 length 5-8 mm., is known from Ohio and Texas. 



1499 (10,071). Chrysobotheis purpureovittata Horn, Trans. Am. Ent. 



Soc, XIII, 1SS6, 76. 

 Moderately elongate, feebly depressed. Bright blue or green, varying 

 to violet or coppery bronze; elytra each with a moderately broad purple 

 black stripe, reaching from humerus nearly to tip, indistinct on the violet 

 or bronze forms. Third joint of antenna? very little longer than fourth. 

 Clypeus broadly triangularly emarginate, the notch oval at bottom, curved 

 on each side. Thorax one-half wider than long, sides nearly straight, sur- 

 face sparsely punctate at middle, more densely and slightly strigose near 

 the sides. Elytra a little wider than thorax, parallel, margins rather coarsely 

 serrate, tips obtuse ; surface with only the usual basal fovea and a depres- 

 sion betweeu the humeri ; rather finely, sparsely and evenly punctate. Length 

 5.5-7.5 mm. 



Horn's types came from "Indiana, Illinois and Texas," no spe- 

 cial location indicated. I have not seen examples from the State. 



1500 (4639). Chrysobothris femorata Fab., Syst. Eleut, II, 179S, 208. 

 Oblong or elongate-oblong, 



subdepressed. Color usually dark 

 bronze, sometimes slightly brassy 

 or cupreous ; antennas greenish or 

 cupreous, the third joint a little 

 longer than the next two. Clyp- 

 eus described in key. Thorax 

 more than twice as wide as long, 

 widest slightly behind the apex ; 

 disk irregular, with an indistinct 

 median depression, and a deeper 

 one each side behind and parallel 

 with the apical margin, with 

 other i r r e g u 1 a r ones near the 

 sides; surface rather coarsely punctured, more densely on the sides. Ely- 

 tra a little wider than thorax, sides nearly parallel, gradually narrowed 

 on apical third, margin serrate, tips obtuse ; sculpture of disk very variable. 



Fig. 302. a, larva; b, beetle; c, head of male: d, pupa, all 

 twice natural size. (After Chittenden.) 



