1884.] E. Becher — A new S})ecies 0/ Siinulium//'o>/i Assam. 199 



V. — A neiv Species of Simxdmm from Assam. — Bij Dr. Edward Becher, 

 Vienna. Gominimicated and translated by the Natural History 

 Secretary. 



[Received October 13th ; — Read November 5th, 1884.] 



(With PI. XIY.) 



SiMULIUM INDICUM, nOV. SpeC. 



2 . Caput et thorax hrunneo-nigra ; thorax convexus, scutellum 

 nigrum ; palpi 4i-articulatif fusci ; antennae 10-artictdatae, fuscae ; alae 

 magnae, latae, nervi costales crassiores quam reliqui ; pedes varii : femora 

 et tibiae in basi flavae, in apice fuscae, tarsi fusci ; abdomen breve, seg- 

 mentum primum latissimum ; hoc et trium sequentium pars ventralis 

 flavicans, ccetera subfusca. Longitudo 3 mm. 



Head free, star ding pretty low ; brown-black ; forehead broad, 

 cljpeus short, nearly vertical ; eyes kidney-shaped, with a moderate notch 

 for the reception of the first antennal joint. Ocelli wanting. Antennas 

 dark brown-black, 10-jointed ; the second joint distinctly constricted 

 off from, and equal in length to, the first, and longer than the rest ; 

 the three succeeding joints broader than long, telescoped into one an- 

 other ; the four next equally long and broad, each tapering to the apex, 

 the last joint pointed at the apex, somewhat longer than the preceding. 



Proboscis salient, dark ; mouth-parts differing in matters of detail 

 only from those of the typical form ; palpi dark, 4-jointed, the basal joints 

 lighter ; the first joint short, the palp-scale resembling it and thus appa- 

 rently representing a fifth joint, the second and the third joints almost 

 of the same length, the fourth 1^ times as long as the third, all the 

 joints pretty equally broad and moderately bristly. 



Thorax brown-black, high-arched, without transverse suture, tergum 

 and scutellum velvet-black, somewhat shining, sides of the thorax lighter, 

 especially near the coxoe of the first pair of legs. 



Wings* large and broad, the marginal vein thick, terminating before 

 the apex of the wing, the anterior branch of the first longitudinal vein 



* In order to faciUtate comparison with other descriptiong, the usual nomen- 

 clature of the veins of the wings is retained in the following description. According 

 to Adolf's theory, the veins should, in consideration of Brauer's work on this subject, 

 be named as follows : — the anterior branch of the first longitudinal vein = tho 

 auxiliary vein (HilfsaderJ ; the principal branch of the first longitudinal vein = 

 the first longitudinal vein ; the small transverse vein = the trunk of the third 

 longitudinal vein ; the third and the fourth longitudinal veins = the third longitu- 

 dinal vein ; the succeeding fold = the fourth longitudinal vein ; the fifth and tho 

 sixth longitndinal veins = the fifth longitudinal vein ; the fold = tho anal vein (Conf. 

 Braucr, Dcnkschr. d. Kais. Akad. d. Wisson. Wicn, Math. Nat. CI. Bd. xliv, 1882, 

 p. 90, and Wiener Eut. Zcitschr. ii, 1883, lloft 2, p. 27). 

 27 



