162 PROC. ENT. SOC. WASH., VOL. 20, NO. 8, NOV. 1918 



same value as the position of the basal vein. The position of the 

 basal vein separates the subfamily Nematinae from the sub- 

 family Cladiinae; and by using this character, the two subfami- 

 lies can not only be easily distinguished in the adult, but the 

 species, which in the larvae are closely related, can be grouped 

 together. 



In the author's judgment, the genus Hoplocarnpa is not closely 

 allied to the genera Calirora, Phyllotoma. and Heptamelus with 

 which it is grouped by Enslin and Konow. These genera are 

 readily separated from Hoplocarnpa in the adult by the absence 

 of a prepectus. The habits and characters of the larvae are 

 also quite different. 



NEARTIC GENERA OF THE TRIBE HEMICHROINI. 



This synopsis, while prepared especially for neartic forms, in- 

 cludes all the genera of the tribe Hemichroini known to occur in 

 the world with the possible exception of the genus H oplocampoides 

 Enslin, which is known only from description and cannot well be 

 included in the following synopsis. 



1. Malar space wanting or nearly so; second recurrent received by 



the third cubital cell or interstitial with the second intercubitus. . 2 

 Malar space large; head and thorax shining; second recurrent usu- 

 ally received by the second cubital cell 3 



2. Tarsal claws cleft; head and thorax coarsely punctured; third and 



fourth antennal joints subequal; eyes subrenif orm ; interradius 



wanting Craterocercus Rohwer 



Tarsal claws with an erect inner tooth near the middle; head and 

 thorax shining, not coarsely punctured; third antennal joint 

 longer than fourth; eyes elongate, oval; interradius wanting 



Caulocampus Rohwer 



3. Second recurrent received by the third cubital .... Hoplocarnpa Hartig 

 Second recurrent received in the second cubital 4 



4. Interradius present Hemichora Stephens 



Interradius wanting Platycampus Schi0dte 



Genus Craterocercus Rohwer 

 Craterocercus Rohwer, Proc. U. S. Nat. Mus., vol. 41, 1911, p. 385. 



As far as known this genus is confined to, the Neartic region. 

 The following synopsis will aid in the identification of the species. 



1. Females 2 



Males 7 



2. Clypeus largely or entirely pale"; abdomen with a pale band basall y . . 3 

 Clypeus black; abdomen black or without a well defined pale band 



basally 5 



