.1 Monograpli uf Eqyplian Diplcra. 



10. SCHISTOPTERUM, Becker. 



Beck., Mitteil. Zool. Mus. Berlii). II, 137, (1903). 



Easily distiiiguished by the cleft iu the costa, the greatly curved 

 veius, the indistinct stigma and the two costal bristles. 



Head broader than high ; frons convex and prominent ; face very 

 short, with a carina, and distinctly concave owing to the pi-ominent 

 epistoma; eyes large, somewhat elongated, not distinctly pointed ; 

 probosc.is short and not geniculate; palpi broad and flat, protru- 

 ding and feebly bristly; vertex broad and f lattened ; antennae in- 

 serted helow the middle of the eyes, elongated and slender, the third 

 joint about one and a half times as long as the second, tapering gra- 

 dually towards the tip, but not ending in a fine point; arista short 

 and bare;or.extremely weak, almost obsolète; s.or.l, /.or. 2; rt.2; 

 pi-t. short but strong; genal bristle distinct, yellowish-brown; ocp 

 weak, indistinct and pale. 



Thorax almost globose, with a complète chaetotaxy; sep. short 

 and pale: de. long and strong; hm.2, one fairly long and dark yel- 

 lowish-brown, the lower small, weak and pale ; /)^ not long bui: 

 strong. Scutellum very large, rather rounded with four bristles, the 

 b.sc. very long and the a. se. very short. 



Abdomen broad Init not longer than the thorax, bristly at the 

 tip. Maie hypopygium not prominent, of médium size; female ovi- 

 positor flat below, with the basai joint as long as the fourth and 

 fifth joints of the abdomen together, and the apical joint invisible. 



Wings well characterised by a strong cleft in the Costa, im- 

 mediately before the stigma, thus forming a projecting extremity 

 with two short bristles at the tip; stigma very small, indistinct and 

 situated immediately below the cleft. Most of the longitudinal veins 

 are very much curved and some extremely short ; the subcosta is very 

 .short, somewat S-shaped and indistinct; RI extremely short, ending 

 in a deep curve, almost a semicircle, bordering the outer uiargin 

 of the stigma; R2-h3 also short, curving suddenly almost at right 

 angles and ending at about the middle of the costa; R4-f5 gently 

 curved, .slightly S-shaped and ending exactly at the tip of the wing; 

 Ml much curved away from R4 + 5; radio-median cross-vein almost 

 indistinct, placed after the middle of Ist M2 cell ; inferior angle of 

 Cu. cell not drawn ont into a .sharp point; Ml curved ])osteriorly 

 almost at right angles. 



