THE CANADIAN ENTOMOLOGIST. 115 



and sub-moniliform. One dot on the alar scales with a line before and 

 another one under, tlie collar, and scutellum, white. Wings slightly infus- 

 cated ; the areolet pentagonal, the nervures black. Metathorax with the 

 angles projecting, sub-spinose, the ventral area transverse, its anterior 

 angles rounded. Legs black, the four anterior tibice with a white line 

 exteriorly, the posterior with a smaller one near the base. Abdomen 

 elongate, with the peduncle slender and punctured, entirely black. Van- 

 couver. 



Allied to IcJi. subcyanens Cress., but of a larger size, with crura 

 entirely black, and white markings also different. 



PLATVSOMA, nov. gen. 

 (From piatys, depressed, and soma, body.) 



Head large, much produced behind the eyes, these somewhat small. 

 Antennae half the length of the body, setaceous, thick, with short articles 

 sub-moniliform. Thorax long and depressed, the prothorax produced 

 anteriorly in the form of a neck, narrower than the head ; the mesothorax 

 with its median lobe advanced and elevated upon the prothorax ; scutel- 

 lum depressed, with a fossula before ; the metathorax elongate, bearing 

 four longitudinal carinae. ^Vings short, areolet wanting, the nervule 

 dividing the two cubitals short. Legs with crura swelled, inermous, the 

 tibije cylindrical at the base, thence enlarged and slightly compressed, the 

 intermediate ones much compressed in the middle of their enlarged por- 

 tion. Abdomen elongate, shortly pedunculate, the first segment depressed, 

 bearing a carina on the lateral edges, the extremity slightly compressed 

 and cleft under side for the reception of the terebra, which is as long as 

 the body. 



Allied to Xylonomus and Odontomerus, but differing from both by the 

 shorter and thicker antennse, by the inermous crura, and by the form of 

 the tibiae. 



Platysoma tibialis, nov. sp. 



^ — Length .45 inch, length of the terebra .45 inch. Black, with legs 

 rufous and abdomen brownish rufous. The head and prothorax strongly 

 punctulate, the fossula before the scutellum striate. The metathorax 

 transversely striated at the base between the carinae. The first abdominal 

 segment finely aciculate between the lateral carinre. Valves of the terebra 

 brown ferruginous. Vancouver. 



