228 THE CANADIAN ENTOMOLOGIST. 



It is believed, however, that these difficulties have been surmounted 

 and that other students will now have no trouble in recognizing these 

 subfamilies by the use of the following table : 



Table of Subfamilies. 

 Cubitus originating from the subcostal vein beyond the apex of the basal 



nervure 2. 



Cubitus originating from the apex of the basal nervure or only a little 

 away from it. 



Costal vein slender towards base, but very much thickened or 

 broadened at apical one-third ; marginal cell not appendiculated 

 and with no space between its apex and the costal margin ; 

 antennpe short, filiform in both sexes, from 6-10- 



jointed Subfamily I., Lobocerinse. 



Costal vein not very much thickened and almost of a uniform 

 thickness throughout ; marginal cell at apex a little away from the 

 costal margin, and appendiculated ; first dorsal abdominal segment 

 emarginate, or with a median slit ; $ antennas short clavate, 5-8- 

 jointed, or filiform subdentate, 14-20-jointed ; antennae usually 



ramose or flabellate Subfamily II., Pterygophorinse. 



2. Submedian cell always shorter than the median, the transverse median 

 nervure joining the median vein very much before the origin 

 of the basal nervure ; $ antennae filiform, the flagellar joints 

 subdentate beneath, or clavate ; $ antenn* flabellate or ramose ; 

 first dorsal abdominal segment with a median 



slit Subfamily II., Pterygophorinse. 



Submedian and median cells equal or nearly so, the transverse median 

 nervure being interstitial with the basal nervure ; antennse short 

 clavate in both sexes, 6- or 7-jointed ; first dorsal abdominal segment 



entire Subfamily III., Perginse. 



Subfamily I. — ^Lobocerin^. 

 This group, but without proper characterization, was first recognized 

 as a subfamily by Mr. VV. F. Kirby, of the British Museum, who placed 

 in it only three genera, viz.: Perantherix, Westw. ( = Acordulecera, Say); 

 Loboceras, Kirby. and Aulacomeres, Spinola. The other genera, recorded 

 below, he placed with the Cimbicidae. 



The subfamily is very sharply separated from the other two sub- 

 families, here defined for the first time, by the characters made use of in 

 my table. 



