PLKCIA. 163 



Only . dorsum of thorax and scutellum 



reddish yellow, the sides and metanotum 



black ; antenn.T ten-jointed tercjorata, Rond., p. 164. 



.'}. Wholly black species 4. 



Dorsum of tliorax reddish yellow ; antennte 



twelve-jointed indicu, lirun., p. 105. 



4. Legs wholly black ; length 8-12 mm. ; 



antennns twelve -jointed atru, Brun., p. 1G5. 



Legs mainly brownish ; length 6-7 mm. ; 



antenn;i3 ten-jointed obscure/, Brun., p. 166. 



lis. Plecia fulvicoUis, F. (PI. XII, figs. 12, 15.) 



Hirtea fulmcollis, Fabricius, Syst. Antl. p. 63 (1805). 



Plecia fulvicoUis, Wiedemann, Auss. Zweifl. Ins. i, p. 73 (1828). 



Penthetria thoraciva, Guerin, Bel anger's Vov. aux Indes-Or Zool 



p. 507, pi. iv, f. 9 (1833). " '' 



Plecia dorsalis, Walker, Proc. Linn. Soc. i, p. 5 (1857). 

 Plecia snbvarians, Walker, op. cit. i, p. 105 (1857). 



S $ . Head : in the male the vertex is more or less couspicuous ; 

 iu the female the frons is dull black, barely one-third the width 

 of the head, with a longitudinal ridge iu the middle from the 

 vertex, ending below in a small protuberance immediately above 

 the antennae. In both sexes the twelve-jointed antennae vary 

 from reddish brown to black, sometimes the scape being reddish, 

 with the flagellum black, or vice versa ; in some specimens wholly 

 reddish or brownish yellow. Proboscis and palpi black, with 

 short black pubescence. Thorax wholly orange, varying a little 

 iu tint ; the whole of the sides, scutellum, and metanotum of the 

 same colour. In many specimens traces of the three dorsal 

 stripes of the pattern common iu the Nematoceba can be seen, 

 barely dai-ker than the ground-colour ; in some specimens they 

 are more obvious. Abdomen black, with short blackish hair. 

 Genital organs normal. Legs mainly black ; coxae and trochanters 

 yellowish or brownish yellow, tibiae sometimes dark brown, pulvilli 

 yellowish white. Wings pale brown, only a little darker on the 

 anterior part, sometimes the whole wing pale blackish. Veins 

 distinct ; stigma absent. Halteres yellowish, clubs blackish. 



Length normally 5|-7 millim. One individual examined 

 measured only 4 millim. 



Eedescribed from a considerable number of both sexes in my 

 own collection and in that of the Indian Museum from numerous 

 localities in India, Ceylon, Assam, the Malay Peninsula, Java, 

 and elsewhere. The Indian Museum has it "from Haddo, Eoss 

 Island (Andamaus), 3.iv. 11, at light (Paiva) ; base of Naini Tal 

 Hills, 4. iv. 10 ; Purneah, Bengal, 13. x. 07 (Faiva) ; Kasauli, 

 16. V. 08, Travancore, 19-27. xi. 08 (both Annandale); Jabalpur,' 

 iv. 05, Meerut, 2b. iv. 05 (both Brunetti) ; also Bangalore ; Kaw- 

 karaik, Tenasserim, l.iii. 08 (Annandale) ; Peradeniya, Ceylon, 

 21-28. V. 10 and O.viii. 10, d $ in cop. {Gravely). It is also 



M 



