PHILIP P. CALVERT 331 



two instars. These larvae are reserved for treatment in an- 

 other paper to deal with immature stages of various Odonata. 



Synopsis of the Species and Notes on their Colors, Vul- 

 var Laminae, etc. 



In my paper of 1903 and again in the Biologia volume (1905), 

 I gave synopses of species of Epigomphus arranged in the form 

 of keys for identification. The primary division of both these 

 s3'nopses was based on the second pale antehumeral stripe, since 

 this is a character common to both sexes. Males and females 

 were then treated separately under each of these two primary 

 divisions, fewer species being known in the female sex than by 

 males. 



Dr. Ris has also given a "Tabelle der cf" " grouped primarily 

 on the form of the inferior appendage, the second pale antehum- 

 eral stripe being assigned a secondary position. 



In view of the existence of these three keys it seems unneces- 

 sary to give one here for the males, although the males of verti- 

 cicornis and, of course, of the new species here described (sub- 

 similis) are not included in any one of them. The description 

 of the male of verticicornis^^ is so drawn up that the differences 

 from other species can readily be seen by comparison with the 

 synopsis in the same work, and the description of subshnilis 

 herewith presented follows the same plan. It appears worth 

 while to attempt a key for the females of this genus, since I know 

 them in a greater number of species than in 1905, and since a 

 character of which I then made some use (the spines of the third 

 femora) appears to be too variable to serve as a specific differ- 

 ential.'-^ 



It should be pointed out here that what I call the "occiput" 

 corresponds to what Dr. Ris calls the "occipital platte," and that 

 what he names the "hintern Flache des Occiput" is the rear of 

 the head in my nomenclature, as I incline to the view that this 

 area is pjst-genal rather than occipital. 



=oBiol. Cent.-Amer., Xeur., p. 410, 1908. 



^K'f. the description of the female of verticicomis, lor. ctl. 



TRAXS. AM. ENT. SOC, XLVI. 



