620 Annals of the South African Museum. 



(28) 27. Head longer than wide; the clypeus fairly distinctly carinate and spar- 

 sely pilose .... maculatus, race pictiventris, Mayr. 



(27) 28. Head as wide as long ; clypeus barely carinate, pilose only .on the anterior 

 margin . . . maculatus, race Radamae, var. mixtellus, Forel. 



(26) 29. Head black or dark brown. 



(31) 30. Head as wide as long, its anterior margin not quite two-thirds as wide 

 as its greatest width ; hind margin shallowly concave 



maculatus, race Traegaordhi, Santschi. 



(30) 31. Head as wide as long, but usually a little longer than wide, its anterior 

 margin half, or a little more than half as wide as its greatest width ; 

 hind margin more deeply concave . . . maculatus, Fab. . 



(25) 32. More than 12 mm. long. 



(34) 33. Entirely ochreous, the head a shade darker in front 



maculatus, race cognalus, Smith, var. boera. 

 (33) 34. At least the head and the abdomen partly, or entirely dark brown or black. 



(36) 35. Head, including the closed mandibles, barely more than one-sixth longer 



than wide; abdomen paler at the base, hardlj T maculate 



maculahts, race thoracicus, Forel, var. incommoda, Forel. 



(35) 36. Head, including the closed mandibles, longer. 



(40) 37. Pale spots on the first two abdominal segments large; thorax ochreous 



brown-red. 

 (39) 38. Spots on the 2nd abdominal segment meeting, or almost meeting in the 

 middle, their outer margins not sharply defined 



maculatus, race Liengmei, var. Hansingi, Forel. 

 (38) 39. Spots on the 2nd segment not meeting in the middle, their outer margins 

 sharply defined ; (head quite one-third longer than wide) 



maculatus, race Liengmei, var. importunoides, Forel. 



(37) 40. Pale spots on the first two abdominal segments small and fairly distinct; 



pro-mesonotum blackish brown above, or if brownish red, then the ab- 

 dominal spots are diffuse. 



(42) 41. Pro-mesonotum brownish red; abdominal spots diffuse 



maculatus, race manzer, Forel. 



(41) 42. Abdominal spots distinct. 



(44) 43. The declivity of the epinotum fairly distinct from the dorsum, and steep;, 



spots on the 3rd abdominal segment ochreous and sharply defined 



race Liengmei, var. />' (= melanocnemis, Santschi). 



(43) 44. Declivity of epinotum very oblique, merging gradually into the dorsum. 

 (46) 45. Head and thorax dark brown ; abdominal spots dark ochreous brown and 



indistinct . . race Liengmei, var. y ( = contaminata, Santschi). 



(45) 46. Head and thorax black; abdominal spots pale straw-yellow, distinctly 



defined ...... race Liengmei, var. d. 



The following forms, being unknown to me in nature have been 

 omitted from the key ; maculatus-mce atramentarius Forel and var. 

 liocnemis Emery ; maculaius-race Fornasinii Emery ; C. Bertolonii Em., 

 C. caffer Em., C. Bianconii Em. . The C. diabolus Forel, also omitted, 

 appears to me to be a variety of the race Empedocles Forel. 



