.4 Moiiograph of ligypj'uiii D'tflcra. 35 



and fifth joints and possess minute hlaek l)ri.stlcs on the dorsal 

 surface and a short but vory tut'tc<l tawny-yellow pubcscenœ on 

 thc ventral surface. 



Wings pellucid, willi tlie extrcnic hase, thc stignia and the 

 sul)costal cell yellowish. Squamula; and their fringes pale yellow, 

 and the niargins (hirk yellow. Haltères yellow^ ycllowish-hiown or 

 orange-yellow. 



l'cmale: (PI. III, lig. 0). The sha,pLM)f the ahdonicu is more likc 

 thaï of the narrow-hoclicd speeies of S!/rj)/ii/s or Xanthograinina, 

 froin which the yellow sidc-margins of the thorax and thc yellow 

 niai'kings of thc pleurœ at once distinguish it. 



Frons brightly shining black on thc ujiper ha If aiid down 

 ahout the niiddlc third to nearly thc base of the antcnn;u, the 

 sides of this part being yellowish and shining ; therc is a pecu- 

 liar faintly raised triangic,extending outwards from the antennse 

 to the eyes, below which the upper part of the face has a faint 

 gre.niish tinge ; the pubescence on the upper part of the frons is 

 blaekish, pale below, and mostly crect. 



Thorax with a rather shorter pubescence than in the ma le. 

 Abdomen rather shining, about four times as long as its broadest 

 point, which is usually about the base of the third segment, from 

 which it very gradually narrows to the end of the sixth segment; 

 the side margins of the abdomen are entirely yellow and in typical 

 ,S'. srrijjfa with entire yellow bands on the second, third and fourth 

 segments, of whieh the band on the second segment is the narrow- 

 est, and the band on the fourth segment is emarginate in the 

 middle, behind; the fifth segment has the basai corners and a dorsal 

 line black, as well as two large black spots on the hind margin, 

 which are rather broadly connected with the dorsal line ; the sixth 

 segment has a brownish-black spot on the middle of the base, and 

 two smaller ones on the hind margin ; the seventh segment is 

 brownish-black with orange-yellow sides ; pubescence mainly 

 following the ground colour, short, except about the basai part and 

 the sides. 



Length from 11 (maie) to 9 (female) nun. 



This speeies, as well as ail thosc belonging to this genus, are 

 liable to great variations, especially as regards the abdominal 

 maïkings, such as shape, interruption and sharpness of définition 

 of Ihe yellow abdominal bands, as well as the colour of the legs. 

 Ont of ten spécimens which I nosssss, six maies and four females 

 (which I believe to be the only ones existing in collections from 

 Egypt) there are not two maies exactly alike as regards the abdo- 

 minal markings, and of the four females, three are very dark 

 forms, posscssing a black line down the middle of the face, the 



