or THE FAMILY TJEAPTERraiD^. 197 



2. First subcostal branch of primaries united to the costal vein by a 



recurrent spur be3'ond the end of the cell ; the first and second 

 and the third and fourth branches terminating as separate forks 

 from well-defined footstalks. 

 a. Subcostal branches of secondaries emitted near together ; second 

 and third median branches moderately wide apart. 



Xeropteryx. 



3. Subcostal of primaries 5-branched ; first branch emitted before the 



end of the cell, united to the costal by means of a recurrent spur 

 beyond the cell ; other veins emitted regularly. 



a. Subcostal branches of secondaries emitted near together ; 



second and third median branches from one point. 

 aa. Caudal angle of males obtuse ; antennae of males simple. 



jEschropteryx. 

 ah. Caudal angle of males acute ; antennae of males strongly 

 pectinated Gonorthus. 



b. Subcostal branches of secondaries well separated at their 



origins. 

 ba. Caudal angle of males acute; antennae of males finely 

 ciliated (not pectinated) Nepheloleuca. 



c. Secondaries angulated at extremity of first subcostal as well as 



at third median branch ; subcostal branches emitted near to- 

 gether; all the median branches well separated at their 

 origins. 

 ca. Antennae of males ciliated Thinopteryx. 



4. First subcostal branch of primaries emitted before the end of the 



cell, uniting with the costal by means of an abrupt angle ; upper 

 radial emitted from the subcostal just beyond the cell; second- 

 aries with only the usual acute angle ; the subcostal branches 

 emitted from a footstalk ; median branches all well separated at 

 their origins. 

 a. Antennae flattened, simple Sirinopteryx. 



B. Primaries angulated at extremity of third median branch. 



1. Primaries obtusely angulated; subcostal 5-branched ; first branch 



emitted before end of cell, united bj^ a recurrent spur to the 



costal and to the second branch at some distance beyond the 



cell ; upper radial emitted from the subcostal close beyond the 



cell. 



a. Subcostals of secondaries emitted from one point at the 



anterior angle, and second and third medians from the posterior 



angle of the cell ; antennfe of males serrated and penicillated. 



RiPULA. 



2. Primaries acutely angulated, the margin slightly concave in front 



of the angle ; upper radial widely separated from the subcostal. 

 a. Subcostals and medians of secondaries all well separated at 

 their origins j . antennae of males finely pectinated. 



GONOGALA. 



Ohs. It is possible tliat the last genus in this Table may be 

 more nearly related to Tetrads than to Urapteryx, although 

 agreeing with the latter in coloration and marking. 



