108 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



MONOCTENIN^E 



Monoctenus Dahlbom. 



Front wings with medio-cubital cross-vein in the angle between 

 R -f- M and M ; the free part of 2nd A wanting and the anal 

 veins anastomosing at middle; radial cross-vein wanting; the 

 antennae with more than nine segments. 



M. fulvus (Norton.) Lophyrus fulvus Norton. Howard, 

 Insect Book, PI. xiv, Figs n and 16. 



Body rufous, with a lunate mark about the ocelli, the an- 

 tennae, a spot on each lateral lobe, the metathorax in great 

 part, the dorsal part of the mesopleurae, the ventral margin of 

 the mesopleurae, the pectus, the venter of the abdomen, the 

 basal plates and the first abdominal segment, black; varies 

 until practically entire body except legs is black; antennae 

 with a variable number of segments. Length 8 mm. 



Cladiin^:. 

 Key to Genera. 



1. Front wings with transverse part of M 2 received in cell R* . . 3 

 Front wings with transverse part of M 2 received in cell R 6 . . 2 



2. Claws simple Anoplonyx p. 108 



Claws bifid Platycampus p. 109 



3. Hind wings without an appendage at the apex of cell Ri+2 .... 



Priophorus p. 109 

 Hind wings with an appendage at the apex of cell R1+2 4 



4. Front and middle metatarsi never more than one-half the 



length of their tibiae; tarsal segments all of practically 

 the same width throughout, segmentation indistinct; an- 

 tennae of male with prominent branches or projections at 



tip of basal segments at least Cladius p. no 



Front and middle metatarsi never more than one-third the 

 length of their tibiae; tarsal segments distinctly broader at 

 apex than at base, segmentation very distinct; antennae 

 never with projections at apices of segments, male with 



a blunt projection at base of third segment beneath 



Trichiocampus p. no 



Anoplonyx Marlatt. 

 A. canadensis Harrington. 

 Body black, with edge of the clypeus, labrum, mandibles, 

 tegulae, and legs except coxae, pale honey-yellow ; veins, includ- 



