6i8 M. W. R. de V. GRAHAM 



longer, its median length from nearly half, to slightly more than half, the 

 length of the scutellum, its middle part at least slightly produced caudad of 

 the supracoxal flanges ; plicae sharp over at least the posterior half of the 

 propodeum, sometimes traceable to its base . . . . . . 17 



16 (15) Fore wing with marginal vein nearly 2-5 times as long as the stigmal vein. 



Clypeus without a depression in the middle of its front edge. (Czechoslo- 

 vakia) ......... sp. indet. B. (p. 620) 



Fore wing with marginal vein 1-7 to 2 times as long as the stigmal vein. 

 Clypeus (Text-fig. 496) with a depression in the middle of its front edge 



diver sus (Walker) (p. 619) 



17 (15) Propodeum (Text-fig. 493) medially more distinctly produced caudad of the 



level of the supracoxal flanges, the latter being strongly curved. 



Metapleuron for the most part more weakly sculptured than the mesepim- 

 eron ......... spicatus (Walker) (p. 621) 



Propodeum medially only slightly produced caudad of the supracoxal flanges, 



the latter only moderately curved . . . . . . . 18 



18 (17) Metapleuron for the most part as strongly, though more finely, reticulate than 



the mesepimeron. Caster slightly longer than head plus thorax, 2-5 to 2-7 

 times as long as broad ..... laogore (Walker) (p. 620) 



Metapleuron for the most part more weakly sculptured than the mesepimeron. 



Gaster not or hardly longer than head plus thorax . inchoatus Graham (p. 620) 



19 (5) Fore wing (Text-fig. 508) with costal cell with a short row of hairs on its upper 



surface in the distal half ; basal cell closed below except at its base. 

 Antenna with combined length of pedicellus and flagellum equal to breadth 

 of head ; flagellum distinctly clavate ; clava, in profile, appearing asym- 

 metrical, the dorsal surface of its second and third segments with dense 

 pilosity. Gaster similar to that of spicatus (q.v.) . pilosus Graham (p. 621) 



Fore wing with upper surface of costal cell glabrous (as in Text-fig. 509) ; basal 

 cell sometimes partly open below. Antenna (Text-fig. 506) with combined 

 length of pedicellus and flagellum a little greater than breadth of head ; 

 flagellum only very slightly clavate ; clava, in profile, appearing practi- 

 cally symmetrical, without dense pilosity upon its second and third segments. 

 Gaster (Text-fig. 489) ...... spicatus (Walker) (p. 621) 



20 (4) Antenna with combined length of pedicellus and flagellum equal to the 



breadth of the head ; distal funicular segments shorter, the sixth quadrate. 

 Legs relatively shorter and stouter ; spur of mid tibia nearly half as long as 

 the first tarsal segment, the latter only about six times as long as its maxi- 

 mum thickness. Fore wing with marginal vein about 2-3 times the length of 

 the stigmal vein ....... spenceri Graham (p. 622) 



Antenna (Text-fig. 504) with combined length of pedicellus and flagellum 

 distinctly greater than the breadth of the head ; distal funicular segments 

 relatively longer, even the sixth being slightly longer than broad . Legs longer 

 and more slender ; spur of mid tibia distinctly less than half the length of the 

 first tarsal segment, the latter about 7-5 times as long as thick. Fore 

 wing (Text-fig. 509) with marginal vein 2-5 to 2-8 times as long as the 

 stigmal vein ...... longicauda (Thomson) (p. 622) 



Note. One species, Ch. tenellus (Walker) is known only from the damaged 

 female type specimen, and has therefore been omitted from the key. I regret that 

 it is not possible at present to give a practical key to the males of Chlorocytus. 



