180 THE ENTOMOLOGIST. 



■\ Margins of cheeks descending more or less below the base of the 

 mandibles ; -^nd and 3rd segments of abdomen red. 



I Tarsi and tibise red ; apex of hinder one black. 



§ ScLitellum white. - - - 35. hiiccuhmtus, 6—9 lines (a). 



§§ Scutellum whitish yellow. - 37. gracilentus, 5—6 lines. 



II Tibige whitish straw, apex of frotit one red-brown, apex of hind one 



black. - - . - 36. suspiciosus, 6 — 9 lines {a). 



ft Margins of cheeks not dilated below the base of the mandibles. 



•2nd and 3rd abdominal segments red. 

 X Hind tibiae in the middle straw or whitish straw-coloured. 



* 3rd segment with a short black basal band. 



38. terminator ius, 6—9 lines. 

 *=:-- 3rd segment with the black band ; this and the 2nd, chestnut 

 marked with black, or entirely black. 



39. melanotis, 7 — 8 lines {a). 

 X X Hind tibiae red or reddish straw-coloured at the base. 



■'- 1st to 3rd abdominal segments red. - 46. muUipictus, 3 lines. 

 =i=-i= 2nd and Brd fsegments red, 4th sometimes partly so. 



42. luctatorius, 6 — 8 lines. 

 XXX Hind tibiae black. - - 43. militaris, nearly 4 lines. 



Subdivision II. — Antennae setaceous, after death incurved or subinvoluted, 

 apex distinctly attenuated ; mesothorax and scutellum 

 generally much higher than the metathorax ; hinder coxae 

 not pubescent beneath ; 2nd and 3rd abdominal segments red, 

 the 3rd in both sexes generally transverse. 



a. Scutellum yellowish or white. 



* Gastrocaeli of 2nd segment of the abdomen rather large, the space 



between them equal to the width, or only a trifle wider than 



the middle area of the post-petiole. 

 f Femora black. 



I Spot on coxae and base of tibiae yellowish, especially the hinder one. 



48. 2irhnatorins, 10 — 11 lines. 



II Tibiae red, apex of hinder one and coxae black. 



53. formosus, 5i lines. 

 ft Greater part of femora red. 



§ Hind knees black. - - 50. tjracUicornis, 4 — 5^ lines [a). 



§§ Hind knees not black. 

 X INIiudle area of metathorax subqaadrate. 



52. quadrialbatus, 4 — 5 lines. 

 X X Middle area of metathorax wider than long. 49. helUpes, 7^ hues. 

 =:==:= Gastrocaeli of the 2nd segment smaller, the space between them 

 wide, mostly wider than the middle area of the post- 

 petiole. 

 -»-• 2nd and 3rd abdominal segments red. 



Tibise red, yellow in the middle. 54. caloseshis, 5 — 6 lines (a). 



00 Tibiae red, apex of hinder one black. 



^* From the base of 2nd segment to the apex of the 5th the sides are 

 parallel. - . - - 56. subcylindricus, 6 lines. 



>->-->-^ Abdomen not thus narrowed iu the middle. 



'^- Upper margin of the collar sordid white. 55. ccedatur, 4 — 4^ lines. 



