SPHEGINA, 10 



antenna), witli no central knob, but with upper mouth-edge much 

 enlarged ; antenna) short, 3rd joint ovate, the dorsal arista slightly 

 pubescent. Thoriuv subquadrate, corners rounded, i)ubescence very 

 short ; scutelluin normal, practically bare, a pair of subapical mar- 

 ginal bristles'. Abdomen much narrowed at base, about twice as long 

 as thorax, more or less club-shaped. Lecjs slender; hind femora 

 very much tliickened and very spinose below ; hind tibia) curved ; 

 basal joint of hind tarsi dilated. Wiiu/s with normal venation, 

 except that the apical portions of the 4th and 5th veins jire turned 

 sharply upwards and are upright and somewhat rectangular at the 

 bend ; anterior cross-vein before middle of discal cell : aluhie very 

 small; squamae small, with characteristic fringes peculiar to this 

 geinis. 



Range. Europe, Orient, North and South America, Brazil. 



Table of Species. 



1. Wiugs willi small brownish infuscations . 2. 

 Wings entirely clear 3. 



2. Thorax wholly black ; anterior cross-vein 



just before middle of discal cell; hind 



femora all black except at base bi,sjnno.^{/, liniii., p. 107. 



Thorax brownish ; anterior cross-vein 

 almost exactly at one-third of discal 

 cell, not beyond this point ; hind femora 

 with distinct pale transverse streak 

 below trit<tri(it(t, Brun., p. 108. 



3. Length 4-4i mm.: abdomen mainly black . 4. 

 Lenijtli 7 mm. ; abdomen wholly reddish- 

 brown tricoloripes, Brun., p. 109. 



4. Hind femora yellow; a black ring at 



middle and tip usciiformifi, Brun., p. 1 10. 



Hind femora yellow on basal half; ajncal 



half black tenuis, Brun., p. 111. 



84. Sphegina bispinosa, Brun. (PI. Ill, figs. 9, 10.) 



Sjiheijimt bispi/iosa, lirunetti, liec. Ind. Mus. xi, p. 223 (19L"5). 



Near S. danipes, Fall., of Europe. S $. Head: frons and 

 face with practically parallel sides, only the latter a little broader 

 on lowest part ; frons at vertex in S a little more than one-fifth 

 of the head, shining black, bare, but from a lowangle in front a little 

 greyish dust can be seen on both fions and face. Antenna) with 

 first two joints black, 3rd and arista dark brown, latter micro- 

 scopically ])lumose. Lower part of head and ])roboscis black, 

 latter brown towards tip. Occii)ut black, concave, shining, a 

 little grey-dusted in centre, dead-black behind vertex, no part 

 extending beyond eye-margin. In 5 > frons more than one-fourth 

 of the head ; antenna) a little paler. Thora.v blackish, a little 

 shining and with a more or less dark blue tinge ami microscopic, 

 depressed pale hairs ; suturii exactly at middle of dorsum, very 

 distinct towards sides. Pleura blackish, practically bare, a sus- 

 picion of grey dust here and there ; scnt(dlum concolorous, some 



