386 CLASS vn r. 





Comp. on this family : F. KLUG, Monograph} a Siricum Qermanin 1 , Tab 

 sen. Berolini, 1803, 4to, and (on the following also) the excellent work o 

 TH. HARTIG, Die Familien der Blattivespen und Holziuespen. Mit Abbild 

 Berlin, 1837, 8vo. 



Phalanx I. Oryssides. Borer capillary, incurved at base, con 

 cealed. Radial cell one, cubital cells two. 



Oryssus LATR. Antennae short, with ten to twelve joints, in 

 serted near the mouth. Maxillary palps long, five-jointed, labia 

 triarticulate. Anterior tarsi of females with three joints only. 



Sp. Oryssus coronatus FABB., PANZER, Deutschl. Ins. Heft 52, Tab. n 

 (Sirex vespertilio), DUMER. Cons. gen. s. I. Ins. PI. 35, fig. 4 ; in Germany 

 France, &c. 



Phalanx II. Uroceridce. Borer straight, exsert. Eadial cell 

 two, cubital four. Antennae with eighteen to twenty-five joints. 



a) With maxillary palps long, 6- or ^-jointed. 



Cephus LATR., FABR. Antennae incrassated towards the apex 

 Abdomen compressed. 



Sp. Cephus spinipes, BancJius spinipes PANZER, Deutschl. Ins. Heft 73, Tab 

 17, &c. 



(Species small. This genus is placed in the following family by LA 

 TREILLE and WESTWOOD). 



Xiphydria LATR., FABR. Antennae attenuated towards the apex 

 setaceous. 



Sp. Xiphydria camelus, Sirex camelus L., DUMERIL, Cons. ge"n. s. I. Ins 

 PI. 36, fig. 2, HARTIG 1. 1. Tab. vm. fig. 9, &c. 



6) With maxillary palps extremely short, with only one or two joints. 



Sirex L. (exclusive of species). Urocerus GEOFFR. Antennas 

 setaceous or filiform, long. Maxillse united at the base. 



Sp. Sirex gigas L., Ichneumon gigas, Syst. nat. Ed. x. fern. (Sirex mariscui 

 L. ma.), K<ESEL, Ins. Bomb, et Vesp. Tab. vm. ix., DUMERIL, Cons. gen. s 

 1. Ins. PI. 36, fig. i, KATZEBURG, Forst-Ins. in. Tab. iv. fig. 2 F ; heac 

 black, with a large yellow spot on each side behind the eyes ; the mal 

 with stone-coloured abdomen, the last two rings black ; the female has th 

 abdomen at the base and apex yellow, in the middle dull black. Thi 

 insect is the largest native hymenopterum ; the expanded wings measur 

 2 in. 2 lin., the body i in. 2 lin., and the borer 4 lin. ; but much smalle 

 specimens of the species are met with. The larva lives more than a yea 

 in the wood before it changes into a nymph ; in summer the insect come 

 to view from the pupa after three weeks, but when the larva become 

 a pupa towards whiter, it continues thus throughout the winter. 



