18 
the first recurrent nervure; liind wings always with two discal cells and 
with complete lanceolate cell. 
The following table of genera is based in part on the classification 
given by F. W. Konow, 1 and it is hoped that it will facilitate the recog- 
nition of the new genera, most of which are represented among our 
North American species. 
The revision of genera with redescriptions of old species is limited 
to the genera formerly included in the genus Xcmatus. 
Of the other genera a list of the American species only is given, 
together with a few notes on synonymy. 
1 A1U.E OF GENERA, 
Anterior wings with simple radial cell. 
Lanceolate cell widely contracted in the middle. 
Second and third cubital cells each receiving a recurrent vein. 
Third to fifth, sometimes sixth and seventh, antennal joints of the male 
with a more or less prominent branch at tho tip; antenna- of the 
female somewhat compressed and a\ ith sharp projection at tip of 
basal joints I. Cladius Illig. 
Joints of antenme without projections at tip; third antennal joint 
curved at the base, in the male with a short, blunt fork beneath, and 
in the female with a sharp projection II. Trichiocampue Htg. 
Antenna' without peculiarities III. Priophorus Latr. 
Second cubital cell receiving both recurrent reins. 
Claws bitid IV. Camponiscus Newm. 
Claws simple V. Anoplonyx gen. now 2 
Lanceolate cell petiolate. 
Third transverse cubital wanting VI. Euura Newm. 
Third transverse cubital present. 
Claws bifid, clypeus usually emarginate. 
Tip of the eighth dorsal segment of tho male with a small, blunt, 
more or less awl-shaped, projection; antenna: of female filiform, 
small species, 2 to 5 mm. long, stigma often having clear base, 
sheath often pointed at tip, gall inhabiters.. ATI. I'ontania Cost. 
Eighth dorsal segment of male broader, obtusely pointed, or not at 
all produced at tip; antenna' distinctly tapering toward tip; 
stigma not lighter at base; sheath not pointed at tip; body more 
robust. 
Last ventral segment of male obtusely triangularly produced at 
tip; sheath of female of the usual form; posterior tibke 
simple. 
Mesonotum and pleura 1 shining; antenna> long and slender, 
usually lighter colored beneath; head, viewed from the 
front, almost round; labium but slightly projecting; 
sheaths usually narrow and delicate. . VIII. Pleronus Jur. 
1 Deutsche entomologische Zeitsehrift for 1890, pp. 225-255. 
2 Ano})lonyxgei\. now (av, without; oTtX or, weapon; ovvq. claw) is separated from 
Camponiscus Newm. (of which Leptopus Hartig is a synonym) by the very important 
character of a simple claw without branch or inner tooth. The typo of both New- 
man's and Hartig's genus is Camjioniscus hiridiventris Fall., in which the claws are 
deeply notched, the rays being subequal. Anoplonyx will include Camponiscus pec- 
toralis Lep., C. bicolor Lep., and C. ovatus Zadd. The other two species of this genus, 
C. auritce Z. & B., and C. carinthiacus Z. & B., I have not had an opportunity to 
examine; they may belong with C. luridiventris or possibly come in the new genus. 
