440 



17. The 1st longitudinal vein ending near 

 tip of wing ; discal cell present, its 

 proximal end rectangular; antennal 

 scape very short ; flagellum of 15 



very elongate joints PARACLADURA, Brun., 



The 1st longitudinal vein ending at a [p. 502. 



considerable distance from tip of 

 wing ; discal cell absent, its proximal 



end pointed ; antennal scape normal ; [p. 505. 



flagellum of 13 oval joints CLADUROIDES, Brun., 



Genus RHYPHOLOPHUS, Kol. (PI. XI, fig. 20.) 



Jthypholophus, Kolenati, Wien. Ent. Alonats. iv, p. 393 (1860). 

 Iliaotnya, Kondani, Dipt. Ital. Prod, i, p. 180 (1856). 

 Ormosia, liondani, I. c. 

 Dasyptera, Schiner, Wien. Ent. Monats. vii, p. 221 (1863). 



GEXOTYPE, Khypholophus pliryganoptcrus, Kol. 



This genus is closely allied to Erioptera, the principal differential 

 character being that the wings are pubescent over the whole 

 surface, instead of only along the veins, as is the case in all the 

 other genera of the Erioptera group found in the East. There 

 are two submarginal cells, four posterior cells, and a discal cell, 

 which is open or closed. The antennae are of sixteen joints, and 

 are of considerable length in the males of some species,* the joints 

 being much elongated, strongly pedicelled and pubescent. A 

 discal cell is present or absent; when the cell is absent it is 

 generally the anterior branch of the 4th longitudinal vein that is 

 forked, the cell being then coalesceut with the 3rd posterior cell.f 

 The wing is, generally speaking, slightly broader than in Erioptera, 

 and the veins diverge from each other rather more distinctly, so 

 that they do not present the peculiar effect of parallelism so 

 conspicuous in Erioptera. The 7th longitudinal vein is normally 

 straight, or slightly arcuate, bending downwards or more or less 

 abruptly curved downwards in its middle, presenting its concavity 

 towards the 6th vein. Occasionally + it runs comparatively near 

 *.o the 6th vein in its basal part, but never so pronouncedly so as 

 m the typical Eriopterce. 



Range. The previously recorded species occur in Europe and 

 North America, extending into the Arctic Regions, several species 

 coming from Greenland and Alaska. 



* This does not occur in the Oriental species. 



t These species were placed in the genus, Dasyptera, formed for their reception 

 by Schiner, but our more extended acquaintance with the Diptera has proved 

 that the presence or absence of a discal cell is seldom of generic value unless 

 accompanied by other constant characters. It is not always the anterior 

 branch of the 4th vein which is forked, when the discal cell is absent, as in 

 at least one North American species (E. holotrichus, Os. Sac ) the posterior 

 branch bears the fork. 



} B. nigripilus, Os. Sac., from North America. 



