54 H. C. EFFLATOUN. 



from S. debskii by the four seutellar hristles the yellow face and 

 frons, the yellow hind tibiae, and by the wings whieh hâve their 

 basai fourth entirely hyaline. 



Maie and Female. Length of body : 2.3 — 3 mm., ovipo.sitor : 

 0.(j mm., wing : 2.7 mm. 



DESCRIPTION: — Frons dark yellow in the centre but getUng 

 paler towards the eye margins where it is almost white owing to a 

 very minute silvery-white pulverulence ; face greyish-yellow in the 

 centre and silvery-white on the sides ; cheeks also silvery-white owing 

 to the same minute pulverulence and with a few pale hairs in addi- 

 tion to some pale bristly hairs on the baek, beside the genal hristle; 

 proboscis short, dark yellow and with some pale, longish and erect 

 hairs; palpi yellow, with some minute pale bristles amongst which 

 are intermingled a few black ones near the tip ; occiput black ; vertex 

 dark yellow, slightly narrower than the frons, with the ocellar 

 triangle blackish; antennae yellow with the third joint paler owing 

 to its minute white pubescence: arista black except at the extrême 

 base yellow; ail the bristles of the head are black except the i.or. 

 which are dark yellow near the base and the genal bristle which is 

 very pale yellow. 



Thorax shining black, somewhat aeneous and bearing seat- 

 tered, whitish, adpressed hairs; ail the bristles are black; scutellum 

 very shining aeneous-black and bearing four black bristles; the 

 b.sc. are long, strong and parallel and the two a.sr. shorter and con- 

 verging at the apex. 



Abdomen entirely shining aeneous-black like the thorax and 

 bearing some small, scattered greyish hairs which are darker and 

 longer at the apices and latéral margins of the three last segments ; 

 maie hypopygium rounded, dark reddish-brown and bearing a very 

 délicate but longish dark grey pubescence; female ovipositor as long 

 as the five abdominal segments together, verv shining black and pos- 

 sessing a pubescence very similar to that of the abdomen. 



Legs with ail the front, middle and hind femora blackish exce])t 

 the extrême tip yellow and the tibiae and ail the tarsi whollv yellow; 

 pubescence on legs blackish, but somewhat lighter on the front legs. 



Wings black with the basai fourth entirely hyaline, one small 

 hyaline indentation at the upper margin in the middle and threc 

 deep hyaline indentations at the lower margin; the upper small in- 

 dentation is triangular in shape with the base of the triangle on the 

 Costa, immediately after the stigma, its inner basai angle touching 

 the tip of RI. and its apex just passing over TÎ2+ 3; the three dee]i 

 lower indentations are disposed as follows : the first inner one, which 

 is the broadest, is situated below the stigma and extends from Ml 

 to the lower wing margin; the second indentation which is the 



