THE CANADIAN ENTOMOLOGIST. 85 



fork of R^ ; deflection of ^\l,., raiher long ; Mg in a line with M, strongly 

 deflected cephalad toward M^^.,, nearly, if not quite, obliterating the cross- 

 vein ;;/. Basal deflection of Cui under the middle of cell ist Mg. First 

 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. — ^, . This specimen is much darker than the type; 

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

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

 men replaced by dark brownish gray, etc. This is but an extreme in colour. 



This species is remarkably similar to the species mentioned by Osten 

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

 in the venation, the elongated cell ist Mg and incurved second anal with 

 a spur at the curve being peculiar to S. howardi. 



Holotype. — ^ , Queliniani, Zambesi R., Dec. 20, '08 ; coll. Mr. C, 

 W. Howard. 



Paratype. — (^ , with the type. 



The only species described from Africa is .S*. cornigera 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 compact group, that I propose to set it off 

 in a new subgenus. 



JVeosty?'i7igoinyia, subgen. n. 



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

 markably shortened, no longer than the r-fii cross-vein; R2^3 sinuate, 

 leaving cell Rj very different in shape from that which obtains in the sub- 

 genus 6'/>';7//^^'^;;///rt/ cross-vein jn \ov\g and prominent; basal fusion of 

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

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



Type. — S. cornige7'a, Speis. 



Cornigera is obviously of more recent derivation than the members 

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

 retreat of R^^g toward the base of the wing may give a hint to the manner 

 in which the remarkable venation of Toxorhina came about^ perhaps by 

 the fusion of R2+3 with some other vein, such as Rj. 



A species was described from the Pacific Islands by Grimshaw in 

 1 90 1, as S. didyma (Fauna hawaiiensis, Vol. 3, pt. i (Dipt.), pi. i, figs. 

 14-16), from Honolulu, Oahu De Meijere, in his recent paper, "Studien 



*Berl. Er.t. Zeitschr., 52 (1907). 



