536 A Monograph of Culicidae. 



Heptaphlebomyia monforti. Ventrillon (1905). 

 Archiv. d. Parasitologie I., IX., no. 4, p. 448 (1905). 



" $ . Head. — The head is grey ; bearing in the middle 

 yellow curved scales and black forked scales, and on the edge 

 (sides) yellowish white scales. The eyes are edged with little 

 white scales. Segments of antennae white with very long black 

 hairs. There are some white scales on the basal segment. 



Clypeus small, black and nude. Palpi with four segments 

 covered with white scales ; the base of the two terminal segments 

 has a small tuft of white scales. The proboscis is black, not 

 banded. 



Thorax. — Prothoracic lobes bear a number of yellow hairs 

 and some elongated yellow scales. The mesothorax is greyish - 

 black and is covered with yellow curved scales. The scutellum 

 is slightly yellow and possesses very numerous yellow scales on 

 the three lobes. Metanotum greyish-black and nude. The 

 pleurae have some patches of flat white scales. Halteres 

 yellowish-white. 



Abdomen. — The segments have a blackish yellow hue, and are 

 covered with blackish scales. They have a band of flat whitish 

 scales at their base and a number of yellow hairs on their 

 borders ; at the sides the segments have basal lateral white spots. 

 Yenter covered with flat white scales. 



Wings. — The wings are unspotted. The scales black, narrow, 

 except those of the sub-costal and first long vein which are large 

 and flat. The apex of the sub-costal vein joins at the level of 

 the base of the first sub-marginal cell. This cell is very much 

 longer and a little narrower than the second posterior cell. The 

 stem of the first cell a third of the length of the cell, the stem of 

 the second posterior cell is also that length. The supernumerary 

 cross-vein is nearer the base of the wing than the mid. The 

 posterior is longer than the mid, and twice its length distant. 

 This gnat has the seventh-scaled nervure. The fringes have two 

 rows of scales at the base of the wing to the apex of the fifth 

 long vein, and three rows from this point to the apex of the wing. 



Legs. — Bases yellow and have some white scales. Femora of 

 fore legs have flat white scales on the dorsal surface, and black 

 on the ventral.* Apex slightly yellow. Tibia black and almost 

 covered with white scales. The rest of the legs are black, but 



* This is evidently an error, and means the base and apex. 



