110 GENUS XYELA. 



Genus XYELA. 



Xyela, Dalm., Acta Holm., xl, 122 (1819) ; Htg., Blattw., 349. 

 Pinicola, Breb., Nouv. Bull. Soc. Philom., 1818, p. 116. (This 

 name is pre-occupied.) 



Antennae 12-jointed, inserted over the clypeus. Second and third 



cubital nervures receiving each a recurrent nervure. Lanceolate cellule 



with an oblique cross nervure. Posterior wings with two middle 

 cellules. 



The first joint of the antennae has a short pedicle 

 at its base, reckoned by Westwood a true joint (cf. 

 Int., ii, p. 110), and is about four times longer than 

 the small second, being also thicker than it ; the third 

 is nearly as long as all the succeeding nine joints united, 

 which are slender. Eyes not roundish, situated at a 

 distance from the base of the mandibles. Clypeus 

 slightly dilated, almost transverse at apex. Mandibles 

 dissimilar; the right with a long curved apical tooth, 

 followed by two shorter and blunter ones with rounder 

 edges, and behind there is a large broad dilatation, 

 with a small incision in the apex ; the left wants this 

 projection, and has the two subapical teeth shorter. 

 Maxillary palpi six-jointed; basal joint short, second 

 much longer, third longer than the first and second 

 together, fourth the longest, fifth shorter, longer than 

 second, elbowed at its apex and succeeded by two 

 smaller. 



The ovipositor does not differ in its fundamental 

 structure from that of the true sawflies. The ovi- 

 positor proper is membranous, broad, thin, without 

 teeth, but the apex is somewhat striated. The support 

 is pilose on the outer side ; its apical piece is more than 

 double the length of the basal ; the triangular plate is 

 firmly attached to it. 



In the wings the costal cellule is large and has a 

 cross nervure. The radial nervure originates from the 

 base of the stigma, and is much angled where the 

 nervures are received; the first transverse radial 

 nervure is straight and issues from near the middle of 



