352 EDWARD NORTON. 



3. XYPHYDRIA, Latr. 

 Xiphydria, Latr. Diet. d'Hist. Nat. 1802. 

 Hyhonatus, Klug, Mon. Sir. Germ. 1803. 

 Uroceriis, Juriue, Nouv. Meth. 1S07. 

 Astatus, Panz. 



Sirex, Spec. Linn. Fabr. Rossi. DeVill, Lesk, &c. 

 Ichneumon, Linn. 

 Wings large, with two marginal and four submarginal cells, the first 

 second and third each with a recurrent nervure ; lanceolate cell with 

 oblique cross-line. Under wings with two middle cells. 



Antennse as usual in position, setaceous, 17 — 22-articulate, first and 

 third longest, terminal joints indistinct. 



Head large, orbicular, mandibles broad, with two strong inner teeth, 

 maxillae terminated by two lobes, maxillary palpi long, 5-jointed, the 

 three terminal joints short; labial palpi stronger than maxillary, 

 3-jointed (Westwood), (4-joiuted, Hartig). 



Prothorax elongated into a neck, the collar elevated ; thorax broader 

 than the head ; ovipositor exserted, extending beyond body, sub-serrate, 

 formed as in Urocerus. 



Legs slender, anterior pair longest, their tibiae with one enlarged 

 curved spur, the four basal tarsal joints with two small pulvillaj be- 

 neath. 



Larva with six small exarticulate thoracic legs, and a horny point 

 at tail. 



The larva of X. dromedarius is stated by Westwood to be found in 

 willow trees. 



Writers differ as to the position of this genus, some placing it with 

 the Tenthredinidse as a terminal section, leading to Uroceridte ; others 

 in a sub-family, Xijpliidriadse, {Xijela and Xiphi/dria^ Steph.), but 

 Lepel., Westwood and Hartig place it with Urocerus, where it seems to 

 belong. 



1. X. albicornis. 



Sirex albicornis, Harris, Catalogue, 1835. 

 Xiphydria albicornis, Harris, In], Ins., 1841, 2nd. Ed. 428. 



Black; flagellum of antennse, spots on head and thorax and six spots on each 

 Bide of abdomen, white. Length 0.56, with ovipositor 0.02. Br. wings 0.88 inch. 



9 . — Shining black ; antennae 18-jointed, white, the two basal joints 

 and tip of apical joint black ; head rugose below ocelli, smooth on occi- 

 put; thorax rugose, a smooth stripe in middle of each side lobe of 

 mesothorax; terminal joint of labial palpi much enlarged and truncate, 

 thorax abrupt, rounded before; abdomen polished, basal segments 

 roughened; four parallel stripes, the inner two largest, from ocelli to 



