neiv genera and species of Tenthredinidoi. 149 



no appendicular cellule) and three submarginal cellules. 

 The first submarginal cellule is long and narrow, and 

 receives near its apex one recurrent nervure ; the second 

 is shorter and broader than the first, and is a fourth longer 

 on the upper than on the lower side, through the second 

 submarginal sloping towards the base of the wing, and 

 it receives a recurrent nervure near its apex. The lanceo- 

 late cellule and the posterior wings are as in Cypliona. 



This genus comes near to Ctjphona, but differs in its 

 long, densely pilose antenna=', in having only three sub- 

 marginal cellules, and in its more globular head. 



Trailia urcacensis, sp. n. 



$ . Antennas black, the basal joint pale luteous. Head 

 pale luteous, the tips of the mandibles piceous. Thorax 

 and abdomen pale luteous, except a small black spot over 

 the anus ; pilose : the sheaths of the saws projecting. 

 Legs pale luteous, the tarsi and apical half of posterior 

 tibia3 blackish : the spurs long and curved. Wings 

 hyaline, clouded at the apex ; the costa and stigma black, 

 and densely pilose. 



Length 2| lines ; alar exp. 5^ lines. 



Hab. — Ur^aca, Rio Purus, Amazons. November (Prof. 

 Trail). 



Trailia analis, sp. n. 



$ . Luteous, pilose, the antennae (except the two basal 

 joints), the head (except the mouth), the greater part of 

 the mesonotum, the anal segment, the apex of posterior 

 tibise and the posterior tarsi, black ; the mandibles are 

 piceous. Wings hyaline with a yellowish tinge ; the 

 costa and stigma pilose, pale luteous ; the base and the 

 apex of the Avings from the stigma deeply infuscated. 



Length 4 lines ; alar exp. 9 lines. 



Hab. — Brazil. 



The antennas are longer than in the preceding species, 

 and have the apices more sharply pointed. The calcaria 

 are pale luteous. 



Trailia compressicornis, sp. n. 



S . Luteous, and covered with a fine, close whitish pile, 

 the antennce, the head (except the mouth), the tibias and 

 tarsi, black. Wings deep black ; the tcgulas and costa at 



