74 AN IN TROD L\ V 



\BLE OF SUB-FAMILIES OF LIBK IJ.rLTD.-E.* 



A. \Vin-s alike, vertically folded in iv; remote and prdunclod.) 



B. ~ numerous, at least five in number. t Wings al- 



>iatel.) I. ( 



BB. Antecubital cross- veins two only. (Wings always distinctly petiokitc 



Hind wings differently shaped from front wings; all four wings carried 

 horizontally in repose. 



B. Antecubitals of the first and second series not correspond!: t at 



base. Base of second series of postcubitals with cross-\ 

 C. Eyes remote. 4- ' 



CC. Kyes t- .uching at a single point, the touching ; >rming an 



acute angle. 



CCC. Eyes touching for a considerable space, the touching part straight. 

 or at a single point (.-Eschina /icros), the touching part rounded in a 

 single curve. 



BB. Antecubitals of the first and second series correspond i the 



second series of postcubitals with no cross-veins. 

 C. Each eye laterally tubercled behind. 6. < 



CC. Posterior edge of each eye simple. 7. Lini .: 



CALOPTKRVC.IN.I:. There are only two genera of this sub-family : 

 sentcd in our fauna. In Caloptnyx the wings are very broad, and the i 

 };pace has no trans is. Hct^rina differs in having the wings rather 



narrow, and with the basal space reticulated. In this genus the base of the 

 wings in the male is blood-red. 



ater number of our species belong and 



I the median and subnodal sectors arise from the prin 



sector nearer the arculus than the nodus ; while in Agrion 

 under the nodus. 



^ESCHMN.K. The greater number of our 5 to the typical 



'ma. In the males of this genus the anal angle of tin 

 acute, the lower anal appendage is usually triangular, and thr second ai 

 merit bca: like tubercle. Of the ] 



have out; commo; I 'his is a 1. 



in length 68-74 mm., and having an alai >f 104-110 mm. I 



males of this genus the anal angle of the posterior wi :ulcd like that 



.!es ; the lower anal append. .md truncate; and the 



second abdominal segment 1 



:;'Hix.E. In the typical mphus tin- triangles of all of the wings 



arc without transverse vein nus includes mam 



vhich the following species pertain the triangles have transve 



O mm.; it is remarkabl- 



the length of the pterostigm.i, which inc. mm. /A/., ///.v is 



an . -er species, which expand- 104-114111111. The 



* After B. D. Walsh, I'roc. Ent. Soc. Phil. II. p. 259. 



