100 CONTEIBUTIONS TO CANADIAN PALJEONTOLOGY 



haK the length of the ahdomen: the latter joins the thorax with a 

 broad base. The front wings are relatively broad, and only a little 

 shorter than the thorax and abdomen together. The pterostigma is 

 very distinct, and tapers gradually; while the radial cell is sub- 

 crescentic in shape, terminating just above the apex of the wing, and 

 is nearly as long as the medial cell. The first discoidal and the first 

 cubital cells fuse in the normal way. The second (small) cubital 

 cell is open toward the third, that is, not shut ofi by a cross-vein. 

 The second discoidal cell is large, almost twice as broad as it is high, 

 and is separated from the third by a distinctly culrved cross-vein. 

 The first of the submedial cells is twice as long as the second, and 

 equals the third in length. The vein which separates the first two is 

 distinctly oblique. The antennae are relatively robust, but are not 

 preserved in their entirety. Only one of the legs is to be seen: its 

 length indicating a front or middle member. 



Scudder cites three Pimplas from. British Columbia : — 



Pimpla saxea, Scudder. (Quesnel.) Probably a Xylonomus. 

 Pimpla senecta, Scudder. (Quesnel.) 

 Pimpla decessa, Scudder. (Quesnel.) 



BraconidcB : — 



Oalypiites antediluvianus, Scudder. (Quesnel.) 

 Bracon Scudder. (Similkameen.) 



Formicidce : — 



Formica arcana, Scudder. (Quesnel.) 

 Dolichoderus obliteraius, Scudder. (Quesnel.) 

 Aphaenogaster longwva, Scudder. (Quesnel.) 



Odonata. 



Of this group, only one specimen from Quesnel has been brought 

 to light. This was doubtfully regarded by Scudder as the head of a " 

 libellid— ?Diplax. 



Khaphidioidea. 



Archiinocellia oligoneura, gen. et sp. nov. Figs. 3, 4, and 5. 

 Locality: Opposite Horsefly mine — (July 21, 1906. L.M.L.). 



Only the superimposed apical portions of a front and hind wing 

 are distinctly preserved: and not without considerable pains was 

 success attained in making out what pertains to each wing. This^ 



