THE METALLIC WOOD-BORING BEETLES. 797 



under a of the al)()^•c key. If the hn\er lobes of the tarsal claws are 

 lient iBward as shown in No. 5 of Fig. 307, the insect belongs to 

 Group A. 



KEY TO INDIANA SPECIES OF GEOUP A. 



a. Pi'ostei-mim iiarallel between and behind the front coxse, the apex ob- 

 tuse or truncate ; thorax not impressed at middle, carina of hind an- 

 gles distinct; length 8 or more mm. 

 6. Thorax without a white pubescent space on sides; tips of elytra 

 evenly serrate. 1512. difficilis. 



hh. Thorax with elongate space of dense whitish pubescence on sides; 

 tips of elytra ending in a short, sharp spine, unevenly serrate. 



1513. FEBEISI. 



uu. Presternum gradually narrowing, the apex acute. 



c. Last dorsal segment carinate, the carina prolonged at tip ; length 5.5- 

 7 mm. 

 d. Front with a deep median furrow ; hind angles of thorax not cari- 

 nate in either sex. 1.514. buficollis. 

 dd. Front feebly impressed; hind angles of thorax slightly carinate in 

 female only. lateeaus. 

 ce. Last dorsal segment not carinate. 



c. Male with Inner apical angle of tibiae on all three pairs of legs 

 terminating in a sharp incurved spine ; form slender ; length less 

 than 5.5 mm. 

 /. Antennae very slender with a fringe of long hairs on the outer 

 side ; color olive-bronze. ceinicoexis. 



ff. .\jitenn,'B stouter, not pilose on the outer side ; front of head and 

 sides of thorax greenish. 1515. otiosus. 



ec. Hind tibiae of males not terminating in a spine ; head not or feebly 

 impressed ; length 5-9 mm. 

 g. Males with a densely pubescent space on middle of presternum ; 

 color uniform dull olive-green or slightly brassy. 



1510. MASCULINUS. 



gff. Males with presternum but slightly pubescent; head and thorax 

 brassy or slightly greenish. 1517. aecuatus. 



1512 (4725). Ageilus difficilis Gory, Jlon. Buprest., Supp., 18.57, 224. 

 Elongate. Piceous with a greenish or cupreous lustre, metallic beneath ; 



abdomen with two rows of yellowish pubescent spots on each side, one row 

 above the lateral suture and partly visible from above. Front flat, occiput 

 slightly impressed. Thorax broader than long, sides slightly curved, disk 

 with a feeble oblique depression on sides and another in front of scutellum ; 

 surface rather finely transversely strigose. punctate at apex ; hind angles 

 with a rather .strong curved carina. Elytra with tips rounded, finely toothed, 

 basal fovefe feeble, disk with faint costae, surface with imbricated scales. 

 Prosternal lobe rounded, acutely emarginate. Length 9-13 mm. 



]\larion and Posey counties: scarce. June 19-Jiily 21. 



1513 ( ). AoKiLrs feeeisi Dury, Entom. News, XIX, 1908, 368. 



Resembles diffieiUs. Differs by having the front of head and sides of 



under surface densely covered with white, wool-like pubescence, that on ab- 



