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the Furca (Genit. of Brit. Geom. p. XXIII) ; taking into consideration 

 that there are always slight variations in the genitalia of one species, 

 especially from different localities, it will be seen that with only limited 

 material at one's disposal it is a matter of considerable difficulty to 

 pick out distinctive features that may prove of specific value. We 

 have made about 20 slides of the male organs in this group and have 

 arrived at certain conclusions which we offer for what they are worth. 

 The two branches of the Furca are asymmetrical in the whole 

 group, the left hand one being the longer; in obfirmaria (PI. XXXII, 

 Fig. 5) the branches are slender, short, curving backward toward apex 

 and ending in two short semiequal spines; in warneri (PI. XXXIII, 

 Fig. 1 ) they are much stouter, the left hand one strongly bent back near 

 apex, the inner edge of the apex of both branches being furnished with 

 one very long spine whilst the outer edge has a short spine ; in duaria 

 (PI. XXXIII, Fig. 4) the branches are considerably longer, more 

 slender and less bent back, the apex is rather pointed and furnished 

 with a number of spines, 4 or 5 on smaller branch and 8-10 on longer 

 one, the spines extending a short distance below the apex down the 

 sides and gradually decreasing in size; in septentrionaria (PI. XXXIII. 

 Fig. 2) the branches are shorter than in duaria and somewhat stouter, 

 the apical area is spined in much the same manner but the spines seem 

 slightly fewer in number and more restricted in their area; finally in 

 angularia (PI. XXXIII, Fig. 3) they are as long as in duaria but the 

 left branch is truncate at the apex which is encircled by a whorl of 

 spines whilst the right branch is much as in duaria. We figure the 

 genitalia of all these species and would call attention to the fact that 

 in most instances for the sake of clarity the Coremata on the ninth 

 segment have been removed ; they are however present in every species. 



Selenia kentaria gen. aest. glaucata form nov. (PI. XXII, Fig. 4). 

 We have recently receeived through the kindness of Prof. E. T. 

 Owen of Madison, Wis., specimens of the summer generation of 

 kentaria taken or bred by D. Bruce in New York State for which we 

 propose the above name. As is the case with the summer generation 

 ornata B. & McD. of alciphearia Wlk., glaucata is much smaller, of a 

 bright yellow color with pinkish washing along costa and with the 

 maculation finer and more delicate; beneath, especially on the sec- 

 ondaries, it is more orange than yellow, with the latter crossed by a 

 brown median line just within the lunule and with a narrow pinkish 

 band, broadening toward anal angle, representing the shading beyond 



