214 GRAMMAR OF ENTOMOLOGY. 



enclosed between two appendages. Inhabits fir- 

 trees, occasionally settling on umbelliferous plants. 

 Xyela. 



730. Oryssites (Oryttites). Larva and pupa 

 unknown. Imago with antennae eleven-jointed 

 in the male, ten-jointed in the female, short, rather 

 incrassated exteriorly, the joints of various propor- 

 tions and forms ; mandibles dilated, rounded, 

 pubescent ; maxillae, with the blade, obtuse, 

 rounded ; the galea rather elongate, narrow, and 

 truncate at the apex ; feelers long, -pubescent, and 

 five-jointed ; labium short, with the ligula small, 

 rounded, and entire, and the feelers rather short 

 and three-jointed ; ocelli three ; fore and hind 

 wings moderately large, with numerous nervures ; 

 legs short ; prothorax with very little develop- 

 ment superiorly; podeon as wide as the other 

 segments ; ovipositor spirally convoluted beneath 

 the body. Inhabits fir and horn-beam trees. 

 Oryssus. 



731. Common saw-flies (Allantites). Larva 

 cylindrical, of uniform substance, with six articu- 

 lated and twelve or fourteen membranaceous feet. 

 Inhabits vegetables, feeding upon their leaves in 

 the manner of Lepidopterous larvae. Pupa some- 

 times changes in a cocoon, fixed in a curled leaf 

 of the plant the larva feeds on, but most commonly 

 on or in the ground. Imago with antennae nine- 

 jointed, of uniform substance, or attenuated towards 

 the apex ; mandibles short, strong, very acute at the 



