54 THE GROUP OF BTOTCORNIS. 



the third joint longer than fourth in ? , shorter or equal 

 in <$ . Wings sometimes suffused -with a fuscous tint. 

 Breast smooth, shining, unpunctured. 



The species composing this group are of small size, 

 and have the black bodies rarely relieved on the pro- 

 notum with white. There are three sections in the 

 group : 1st, the section of compr essicornis an dfulvipes 

 with pale testaceous legs and black antennae ; 2nd, 

 ruficornis, puncticeps, and abbreviatus, which have the 

 legs more or less black at the base and the antennas 

 sometimes pale beneath ; and 3rd, the section con- 

 taining appendiculatus and oblongus, which have the 

 first transverse cubital nervure distinct and the pro- 

 notum lined with white. 



Most of the species fall into the genus Pristiphora, 

 Lat., the principal characteristic of which is the pos- 

 session of one radial and three cubital cellules. The 

 larvaB, so far as is known, are green, without any 

 markings, and feed on trees. 



Synopsis of Species. 



1 (13) Legs white or yellowish- white, marked more or less with black 



on coxae and femora. 



2 (5) Tegulae and edge of pronotum white, stigma pale testaceous. 



3 (4) Body and antennae longish, abdomen much longer than head 



and thorax together, antennae brownish beneath. 

 r> Appendiculatus. 



4 (6) Body short, thick; abdomen shorter than head and thorax 



together; antennae black, thickish. Oblongus. 



5 (2) Tegulae white, pronotum black; antennae longish, filiform, 



clypeus slightly incised, stigma fuscous. Hibernicus 



6 (5) Tegulae and pronotum black, stigma fuscous. 



7 (10) Antennae brownish beneath in $ , flagellum entirely so in r?; 



apex of coxae and trochanters white. 



8 (9) Stigma fuscous, wings slightly fuscous in middle; A antennae 



thick ' Rucornis. 



,QN c^-i 1 ' ' ucorns. 



() btigma black, wings hyaline ; < antennae only moderately thick, 

 ,m A ^ s lon g as the body. Fletcheri and nigricollis. 



SSfF**? black in both sexes > coxse and 

 Tibiae clear white. 



ffi f bl r kish - 



Legs testaceous, femora without black. 



