30. 

 XYELA PUSILLA. 



Order Hymenoptera. Fam. Xiphydriadae Leach. 



Type of the Genus X. pusilla Dal. 



Xyela Dalman. 



Jntenncc inserted in the front of the face between the eyes, long, 

 slightly hairy, 12-jointed3 first joint cylindric ; second short, ob- 

 conic j third robust, cylindric, equal in length to the nine follow- 

 ing joints which are filiform, the terminal joint being the smallest. 



Labrian membranaceous, narrowed towards the anterior margin 

 which is entire, ciliated. (2.) 



Mandibles corneous, slightly curved, acute with three irregular 

 teeth on the internal margin. (3. 3.) 



Maxilla: membranaceous, bilobed, ciliated, the superior lobe 

 being terminated by a smaller one. Palpi very long, appearing 

 like feet, 4-jointedj first joint short ; second long, bent, clavate j 

 third very long, dilated towards the centre, attenuated to the 

 apex, which has a small head, hollow internally ; fourth joint as 

 long as the second, membranaceous, flat. 



Mentum dilated anteriorly : Pa/pi 4 -jointed ; first and third joints 



small} second longer ; fourth joint large, somewhat obovate bent 



inward. (5.) 



Lip obsolete. 



Head transverse, depressed. Eyes lateral. Ocelli 3, approximating, 



placed triangularly. Neck short, broad. Thorax not broader than 



the head. Abdomen sessile, 7iearly cylindric, \0-jointed. Oviduct ex- 



serted, compressed. Ovipositor ensiform, membranaceous towards the 



edges, corneous down the centre (7. b.), inclosed between 2 lanceolate 



lamellcE, hairy outside {7. a.) : Jig. 6. represents the under side of the 



oviduct, and part of the abdomen. Legs placed far behind. Tibiae 



slightly hairy with a spiiie at the apex, the posterior with 2 bristles 



un the external edge. Tarsi hairy, as long or longer than the tibia, 



Jirst joint the longest. {8. a fore leg.) Wings large, superior ones 



with 18 cells, 3 marginal, and 2 submarginal complete. Stigma 



large. Inferior wings with many cells. 



The male {Dalman says) is smaller, the anus is simple, not mucro- 



nated, the last segment large, scutiform, entire. 

 Eggs somewhat oval. Metamorphosis and economy unknown. 



Pfsii.LA Dalman in Trans. Stockholm Soc. April 1819. p. 123. 



Smooth, shining. Head black, clypeus and eyes margined 

 with yellow. Thorax black, with two orange spots on tlie an- 

 terior part ; two first segments of abdomen with a yellow spot 

 in the centre, the remainder of the segments brunneous pale at 

 margins, and at the apex. Legs, oviduct and uophi dull ochra- 

 ceous. AnteniiiE and tliighs fuscous. Wings stained pale fer- 

 ruginous. Stigma darker. 



lit the ('(tbinels of Mr. Stephens and the Anthin-. 



