THE CANADIAN ENTOMOLOGIST. 133 



pale line within ; wings hyaline, nervures and stigma black. Abdomen 

 with first segment rugosely sculptured, the segments becoming smoother 

 toward apex of abdomen ; incisures of joints whitish, venter banded with 

 white ; ovipositor 8 mm. in length, or hardly as long as abdomen. 



Male. — Differs from female as follows : Face below antennae and the 

 scape beneath yellow ; anterior cox;e and most of prothorax below yellow ; 

 abdomen long, slender and polished, with the tip of segments narrowly 

 white. Length i6 mm. 



Described from 4 $ and 2 (J taken in June and July on felled bitter- 

 hickory (Carya amara). The females were ovipositing, and probably 

 are parasites of Saperda disco idea or Dorchaschema nigrum. 



The American species, all of which occur in Canada, may be tabulated 

 as follows : — 



Abdomen entirely black X. occidentalism Cress. 



Abdomen with white markings ; 



Ovipositor long X. vittifrons, Cress. 



Ovipositor short, 



Pleura black X. borealis, Cress. 



Pleura with white band X. caryce, n. sp. 



Xorides canadensis, Prov. (Nat. Can., VII,, 248), =Xylonomus 

 albopictus, Cress. 



Xorides vittifrons, Cress., has been found in about the same numbers, 

 as X. caryce, but upon old maples infested with Dicerca divaricata, 

 Xiphydria albicornis, Tremex columba, etc. 



Xorides borealis, Cress., was described from Hudson Bay region ; a 

 ? which I refer to this species differs from the original description in 

 having the posterior femora rufous instead of black. 



Xorides occidentalis, Cress., is found in Vancouver Island. 



Xylo7iojnus caiiadensis, n. sp. 



Female. — Black; length 22 to 26 mm; expanse of wings 30 to 33 

 mm. Head large, face and vertex rugulose, cheeks aciculated, clypeus 

 small with sutures obscurely rufous ; antennae with annulus on joints i o- 

 14. Thorax subopaque above and strongly punctured, pleura and pectus 

 coarsely punctured but shining ; mesothorax flattened or slightly depressed 

 medially, aciculated and with slight median carina ; scutellum punctured, 

 shining ; metathorax with two discal carinae enclosing a narrow oval area, 

 lateral carinae indistinct except at base near spiracles ; rugosely punctate 

 and with small posterior tubercles ; legs black, knees white, four anterior 



