274 GNATS OR MOSQUITOES — CHAPTER XI 



third of the mid., and all the second joint of the hind tarsi 

 white. Thorax hlack, with metalHc blue scales. 



From original description : — 



Proboscis long and black, but distinctly shorter than the body ; 

 antennae fuscous and barely half the length of the proboscis, provided 

 with scanty black hairs ; their first joints, and the circumference of 

 the eyes clothed with glistening, silver3% blue scales ; entire body 

 black, closely covered with glistening blue scales. The abdominal 

 segments, from the first to tlie sixth inclusive, ornamented with a 

 glistening silvery transverse sti-ipe ; the sixth segment provided behind 

 witli a brush of black hairs, and the last two segments with long, 

 fulvous, marginal hairs on either side. The legs fuscous, with paler 

 bases to the femora. Halteres fuscous. Length. — 5| lines (Russian) $ . 



Habitat. — The Amur (Central Asia). 



Note. — The climate of the Amur ^Valley, though hot in summer, is 

 intensely cold for several winter months, so that this is certainly the 

 coldest habitat recorded for anv member of the genus. 



11. MEGARHINA GILESII, Theob. 



(Megarhina sp. from Rikldm, first edition, p. 131). 



Caudal adornment yellow and black. Tarsi unhanded in 

 the cT » hut in the ? the first and the base of the second tarsals 

 are yellowish-white, and in the hind the whole of the second 

 joint, while the mid legs show no banding, but are rather pale 

 throughout. Thorax chocolate coloured with a greenish lustre. 



Antennae dark brown, witii whitish tomentum ; palpi metaUic violet 

 and purple ; proboscis metallic violet, with gi-eenish and golden scales 

 intermixed. Thorax very large, ovoid, with the pointed end forwards, 

 dark chocolate coloured, greenish in certain lights ; pleurse generally 

 hghter tlian the rest of the thorax, with a few scattered bright blue and 

 green scales. Legs with the femora covered with scales of a more 

 or less metallic violet or deep brown, as also are the tibiae. Wings 

 hyaline, shorter than the abdomen, with bro\vn veins, the ant. 

 fork-cell very minute. Abdomen with the three anterior segments 

 dorsally bright metallic green, followed by three of a clear metallic blue, 

 with indistinct paler violet, partly denuded bands ; all segments more 

 or less fringed laterally with golden hairs, and the last two with a sort 

 of aureole of long golden hairs, relieved by dense, velvety black tufts of 

 long hairs on either side. 



In the male the genitalia are scarlet and the ungues of the fore and 

 mid legs miequal, the larger one with a large tooth, the smaller simple ; 

 hind ungues equal and simjile. Length. — 11 mm. <?, 10 mm. $ . 



Habitat. — Upper Burmah ; Sikkim 1,800 feet; Ceylon. 



Time of capture. — April in Burmah, June in Silvkini. 



