THK CANADIAN UNTOMOI.OGISr. 85 



fork of R, ; dellectian of Nf, ., r.iiher long ; iNL, in a line wiih U, strongly 

 defected ceplialad toward \[,.,. neaily, if not ([iiite, obliterating the cross- 

 vein lit. Basal dellection of Cu, under the middle of cell ist M,>. Firsi 

 anal fused with Cu at extreme base ; 2nd anal strongly curved at tip with 

 a spur at the curve, which may be a remnant of a forked anal. 



Paratype. — f,. Tliis specimen is much darker than the type; 

 the fust six antennal segments are dark, remainder yellowish ; thoracic 

 dorsum dark brown, where it is light brown in the type ; yellow of abdo- 

 ' :i--n rei)l.iced by dark brownish gray, etc. This is but an extreme in colour. 



'Phis species is remarkably similar to the species mentioned by Osten 

 Sacken (Mon. Dipt. N. .Am., IV, p. 102, 103). 'I'he main differences are 

 in the venation, the elongated cell ist l^f2 and incurved second anal with 

 a spur at the curve being peculiar to ^. hoivarJi. 



Holotype. — c( , Queliniani, Zambesi R, Dec. 20, 'oS ; coll, Mr. C. 

 W. Howard. 



Paratype. — ■ rj , with the tyjie. 



The only species described from Africa is S. coriiii^era Speiser (Dipt, 

 aus Deutschland Afrikanischen Kolon'!een, p. 130-132, fig. i*). This 

 insect differs so remarkably from the remaining species of the genus, which 

 otherwise form a homogenous comi)act group, that I propose to set it off 

 in a new subgenus. 

 Keoityiiih^omyux, subgen. n. 



Char. — Radius long, its tip beyond the middle of the wing ; R^ re- 

 matkably shortened, no longer than the r-m cross-vein; R.j,;j sinuate, 

 leaving cell R, very different in shape from that which obtains in the %Vih- 

 genus S/y lilt i;o my! ii; cross-vein /« long and prominent; basal fusion of 

 Cu and ist .\ very long ; prothorax narrow, scarcely one-fourth as wide as 

 the head ; above the antennce a short, bent spatulate horn. 



Type. — 5. coinigera, Speis. 



Coiitigera is obviously of more recent derivation than the members 

 of the subgenus Styriitgomyia, and its venation is almost normal ; the 

 retreat of R^.;, toward the base of the wing may give a hint to tlie manner 

 in wiiich the remarkable venation of Toxoihina came about, perhaps by 

 the fu.'jion of Rj,., wilh some other vein, such as R,. 



.\ sjjecies was described from the Pacific Islands by Grimshaw in 

 1901, as .S". didyma (Fauna hmvaiiensis, Vol. 3, pt. i (Dipt.), pi. i, figs. 

 14-16), from Honolulu, Oahu De iMeijere, in his recent paper, 'Studicn 

 •Berl. Er.t. Zeitschr., 52 (1907). 



