24; [January, 1917. 



13 (10) Scutellary stria present. (Coenokbhinus.) 



14 (17) Ninth stria reaching- the apex. 



1.5 (16) Elytra dark blue-green ; tenth stria at the base lost in an irregtilar 

 double row of punctures ; interstices wider than the striae ; pubes- 

 cence shorter, darker, and less projecting germanicus Herbst. 



(minutus Fowler.) 



16 (15) Elytra bronze-green; tenth stria simple at the base; interstices 



• narrower than the striae ; pubescence longer, paler, and more pro- 

 jecting aeneovirens Marsh. 



17 (14) Ninth stria not reaching the apex. 



18 (21) Elytra bkie or greenish-blue. 



19 (20) Sides of head behind the eyes bulging outward. Thorax with a feeble 



middle channel. Elyti-al interstices convex, scarcely so wide as, the 

 striae with an irregular roAv of very fine punctures. Pubescence 

 long and very sparse pauxilhis Germ. 



20 (19) Sides of head behind the eyes straight. Thorax exti'emely closely 



punctured, with a trace of a smooth middle line. Elytral inter- 

 stices fiat, Avith a distinct and regular row of punctures. Pubescence 

 long and dense interpunctatus Steph. 



21 (18) Elytra red, with or without a blackish suture aequatus hmu. 



22 (1) Length of elytra twice as great as their width. 



23 (34) Head not constricted into a neck. 



24 (29) Body with long projecting hairs. (Lasiorhtnchites.) 



25 (28) Elytral striae distinct to the apex. 



26 (27) Head and thorax blackish-green, elytra greenish-blue. Elytral inter- 



stices with a single row of punctures. Male : basal half of the rostrum 

 with a smooth middle line bounded on each side by a row of large 

 irregular punctures, which are sometimes confluent, the outer edge 

 of these punctures lying in the same horizontal plane as the smooth 

 middle line, and therefore giving rise to the appearance of three keels, 

 a very narrow one on each side and a broad one in the middle. 

 Female : basal half of the rostrum with large crowded irregiilar 



punctures olivaceus Gyll. 



{ophthalmiciis Auctt. Brit, nee Steph.) 

 {sericeus Auctt. Brit, nee Herbst.) 



27 (26 j Upperside purple-blue (violet). Elytral interstices irregularly and 



somewhat deeply punctured. Male : rostrum behind the antennae 

 with two longitudinal grooves each containing a few punctures, and 

 just behind the base of the antennae a deep oblong groove. Female: 

 rostrum behind the antennae with a few coarse, shallow punctures, 

 behind the base of the antennae a deep oblong groove... 



sericetis Herbst. 

 (ophthalmicus Steph.) 



