62 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



RHINOPSYLLA ANTENNATA PROXIMA CrawJord, 



The chief variation from the species lies in the cephalic characters. 

 The anterior emargination is less pronounced, and the basal segments 

 of the antemise are distinctly smaller, but of the same type. The 

 sulcate depression on the vertex is more marked. The genal cones 

 are entirely wanting, as in the other species of the genus, but the 

 gensd are more globosely enlarged beneath the antennae. The color 

 is lighter in the varietal form, but this may be of no importance. 



Described from one female collected in Colorado by C. F. Baker 

 (no data). 



Type in author's collection. 



The varietal form approaches rather closely to species of Kuwayama 

 (of Triozinae) in the shape of the head, except for the anterior emar- 

 gination, in which they are qiute distinct from each other. 



Subfamily CE;E,I^CIiE:]yEIN-.^E. 



This subfamily was created by Enderlein in 1910 ('10: 138) for a 

 number of unrelated genera, some of which should be referred to 

 Carsidarinse and some to Psyllinse. Two species only of the typical 

 genus, Ceriacremum, are known in the New World fauna, and for 

 these species Enderlein's subfamily name is retained. The limits of the 

 subfamily, however, are very uncertain. The chief character upon 

 which it stands is the presence in the forewing of one or more addi- 

 tional marginal cells, besides the usual two which are formed by the 

 forking of the media and cubitus. The additional ones are formed 

 either by the forking of the radial sector or by a cross vein between 

 the latter and the medial vein. 



This character is possessed by a dozen or more species, mostly tropi- 

 cal, but there are often wide differences between these species in 

 other characters. It seems probable that this venational character, 

 after further study of the tropical Psyllid fauna of the world, will 

 prove to be valueless as a subfamily character. However, since 

 only a few of these species are available for comparison at present, 

 the most reasonable course to follow is to retain Enderlein's subfamily 

 name for our two species, and to omit describing or designating the 

 limits of the subfamily until more detailed study is possible. For 

 the present, the description of the single New World genus, Ceriacre- 

 mum, may suffice for the subfamily description. 



Ceriacremum resembles members of Psyllinsein cephalic and thoracic 

 characters, having the frons completely covered by the gense. PJia- 

 copteron Buckton ('94: 18) resembles Ceriacremum in venational 

 characters, but differs widely in having the frons not covered by 

 the gense. 



