BY FREDERICK A. A. SKUSE. 297 



277. Ceratopogon Mastersi, sp.n. (PI. xiii., fig. 34). 



^. — Length of antennae 0'035 inch ... 0*88 miUimetre. 



Expanse of wings 0-065 x 0-018 ... 1-66 x 0-45 



Size of body 0-070x0-021 ... 1-77x0-52 



^. — Length of antennae 0-027 inch ... 0*68 millimetre. 



Expanse of wings 0-065x0-025 ... 1-66x0-62 



Size of body 0-070x0-022 ... 1-77x0-55 



$ and 2- — Antenna entirely black ; $ plumes with a cupreous, 

 reflection. Head, thorax, pleurae, pectus and metanotum black 

 or very deep brown, levigate; thorax with a sparse, short, yellowish 

 pubescence ; scutellum brown, fringed with long yellowish-brown 

 hairs. Halteres yellowish or white, the stem more or less 

 discoloured. Abdomen black, or very deep brown, rather dull, 

 clothed with brownish hairs ; in ^ twice the length of thorax, 

 with short, thick holding-forceps ; in ^ short and robust, lamellae 

 of ovipositor ochreous. Legs ochreous-brown with yellow or 

 brownish-yellow hairs. In fore legs tibia J longer than metatarsus. 

 Wings about the length of entire body, pellucid, almost hyaline, with 

 a faint brownish tint on anterior half, brilliantly iridescent, pubes- 

 cent only aboat tip in ^ ; veins brown ; costal, first two longitu- 

 dinal veins, middle cross-vein and basal half of fourth longitudinal 

 very distinct. Auxiliary vein indistinct, terminating in costa a 

 little before tip of first longitudinal vein ; first longitudinal 

 reaching costa at a point J (rather more in ^) distance from base 

 of second longitudinal to tip of costa, and opposite tip of posterior 

 branch of fifth longitudinal fork ; marginal cross-vein very short ; 

 inner marginal cell very narrow ; second longitudinal reaching tip 

 of costa, in ^ somewhat before, in Q opposite, tip of anterior 

 branch of fifth longitudinal fork ; indistinct fork of third longitu- 

 dinal present ; fork of foui-th longitudinal pale, with a short 

 petiole, anterior branch reaching margin, in ^ at, in ^ a little 

 below apex of wing, posterior branch detached at its base, reaching 

 wing-margin mid-way between tips of anterior branch and the 



