416 TIPULIDJE. 



Genus RHAMPHIDIA, Mg. 



Rhamphidia, Meigen, Syst. Besch. vi, p. 281 (1830) ; Schiner, Fauna 

 Austr, ii, p. 558 (1864) ; Osten Sacken, Monog. Dipt. N. Am. iv, 

 p. 103 (1869). 



Megurhina, St. Fargeau, Encycl. Meth., Ins. x, p. 585 (1825). 



Helius, St. Fargeau, op. cit. x, p. 831 (1825). 



Leptorhina, Stephens, Cat. Brit. Ins. ii, p, 243 (1829). 



GENOTYPE, Limnobia longirostris, Mg. ; by designation of AVest- 

 wood(1840). 



Head: eyes sepai-ated above by a narrow front, nearly con- 

 tiguous on underside of head. Proboscis elongate, longer than 

 the head, but shorter than the head and thorax together, mode- 

 rately stout, palpi situated at its tip ; their first two joints 

 very short, the 3rd but little longer, the 4th linear, slender, 

 about as long as the first three taken together ; when at rest, 

 the tip of the proboscis, pointing backwards, reaches but very 

 little behind the root of the 1st joint.* The antennae, if bent 

 backwards, would not quite reach the root of the wings; 16- 

 jointed, 1st scapal joint long, 2nd subglobular, both conspicuous ; 

 flagellum somewhat incrassated at its base, the joints subcylin- 

 drical, short, more elongated towards the tip, verticels moderately 

 long. Thorax somewhat broad in front, prolonged into a short 

 but distinct neck; thoracic suture deep. Abdomen normal. 

 Genital organs of the male consisting of a basal plate, a pair of 

 claspers ending in two horny hooks on each clasper. Ovipositor 

 of female of the usual structure. Leys long, slender, finely 

 pubescent ; tibiae without spurs at tip ; empodia indistinct, ungues 

 smooth. Wings moderately long, broader or narrower in different 

 species ; with one submarginal cell, four posterior cells, and a 

 discal cell ; 2nd longitudinal vein not forked. The auxiliary vein 

 ending opposite the inner end of the submarginal cell, sometimes 

 in the costa, sometimes turned down at the tip into the 1st 

 longitudinal at some distance anterior to the tip of the latter. 

 Subcostal cross-vein, when present, at tip of auxiliary vein ; some- 

 times obsolete ; t no marginal cross-vein ; stigma present or 



* This is according to Osten Sacken, referring to the North American 

 species B.flavipes, as examined by him in a living specimen. He adds that 

 Meigen's illustration (Syst. Besch. vi, pi. Ixv, fig. 8) gives a correct impression 

 of the palpi, so presumably the characters are sufficiently definite to regard 

 them as generic. 



t Osten Sacken says " in some specimens the subcostal cross-vein is obsolete ; 

 in such cases the auxiliary vein ends in the 1st longitudinal and not in the 

 costa." Whether by the use of the word " specimens " and not species he intends 

 to infer that this occurrence is adventitious, is not clear. In one of the two 

 Oriental species (E. ferruginea, Brun.), the auxiliary vein ends in the 1st 

 longitudinal vein just beyond the proximal end of the submarginal cell, at a 

 considerable distance beyond the origin of the 2nd vein, and some distance 

 before the tip of the 1st vein. 



