À Monograph o/ Égyplian Diplcra. âl 



Slule and Female. Length of body : 3.2 — 3.5 mm.; ovipositor : 

 0.5 mm.; wiug : 2.8 mm. 



DESCRIPTION: — Head yellow and eutirely covered with a 

 pale grey tomentiun which is somewhat whitish and denser on the 

 face; epistoma but little prominent; proboscis and palpi very short, 

 pale yellow and pos.sessing some small blackish bristly hairs; eyes 

 large, rounded; antennae yellow with the third joint twiee as long 

 as broad, a little concave above and pointed at the tip ; arista blackish 

 but yellow at the base; the pubescence is very inconspicuous, scarce 

 and yellowish; ail the bristles are shining yellowish-brown except 

 the upper s.oi-., the parallel pvt.; the outer rt and the ocp. white. 



Thorax and scutellum entirely covered with a dense cinereous 

 tomentum. but the blackish ground colour of the dise shows in certain 

 lights; scutellum very flat and yellow at the tip by transparency ; 

 mesophragma blackish but also covered with a dense grey dust ; ail 

 the bristles are shining yellowish-brown, appearing somewhat pale 

 and transparent in certain lights except the j). npl. and the st. 

 white; the mpl. and the ,s'^ are accompanied by some white bristly 

 hairs; ail the bristles on tî^e dise and scutellum are inserted on small 

 blackish dots; the pubescence on the dise is short but rather den.se, 

 adpressed and very pale yellowish. 



Abdomen short and broad. entirely yellowish except for a bla- 

 ckish, often inconspicuous médian longitudinal line; sometimes this 

 dark colour extends laterally, especially on the basai segment and on 

 the fourth and fifth segments; ail the segments are entirely covered 

 with a cinereous dust; the pubescence is rather dense, very pale 

 yellowish and is longer and bristly on the lower margins of the seg- 

 ments, espi'cially at the apex; ovipositor very short, being a little 

 longer than the fifth segment, flat, conical and reddish-yellow; the 

 extrême tip of its basai segment is usually blackish. 



Legs entirely yellow with a minute blackish pubescence. 



Wings of a characteristic milky white colour and somewhat opa- 

 que, with the stigma and ail the veins yellow; médian and radio- 

 median cross-veins very approximate, the distance between them 

 being not more than the length of the latter; inferior angle of Cu 

 cell drawn out intc a short, broad point, shorter than the M. cell ; 

 costal bristle weak. 



Scjuamulae whitish; haltères yellow. 



This species was originally found by Becker in the désert near 

 Riala (Fayoum) on the Composite plant Pliichea {Conyza) dioseoridis 

 in March (together with the curions Schistoptenim moehhisi Beck.). 



T. jilarrisciiteUata is common wherever its widcly distributed 

 host plant grows and I hâve bred it from the inflorescence of the 



Mémoires de la Soc. Roy. Ent. d'Egypte 8 



