456 TERTIARY 1NSECJTS OF NORTH AMERICA. 



nearly equiangular, following the posterior edge of the sixth abdominal 

 segment laterally, are to be considered the anal cerci is doubtful. 



Directly beside this specimen, and, in fact, partly underlying it, are the 

 abdomen and part of the sternum of another insect, which, although much 

 smaller, should doubtless be regarded as the female of the same species. 

 This abdomen represents an under surface ; it is very rounded and ovate, 

 the extremity well rounded, the sixth segment represented by a circular 

 fissured plate. The sides of the abdomen are punctulate, as in the other 

 specimen, but the punctulation dies out before reaching the middle of the 

 abdomen. Little can be said of the other parts of the body, excepting that 

 the rostrum appears to terminate at the front limit of the middle coxse, and 

 the sternal parts of the thorax are coarsely punctate as above and more par- 

 ticularly at the margins of the separate pieces. 



Length of the male, 15"""; of head, 2.9""" ; breadth of same beyond 

 the base, 2.4"' m ; length of thorax, 3.2o""" ; of tegmina, ll mm ; breadth of 

 same near tip, 4.35 mm ; length of scutellum, 4.2""" ; breadth of same, 4.5 mm : 

 greatest breadth of abdomen, x mm : breadth of its dorsal face at tip of scu- 

 tellum, fi mm . Length of abdomen of female, measured beneath, 4 mm ; breadth 

 of same, 5 mni ; width of fissured plate, 1.25 mm . 



Quesnel, British Columbia, One specimen, No. 38, Dr. G-. M. Dawson. 



'1. TKLEOSCHISTUS KIGORATUS. 

 PI. L'8, Fig. 14. 



Head punctate, the punctse moderately deep and rather sparse, absent 

 from the extreme back of the head. Thorax irregularly punctate, at the 

 sides very deep and sharp, on the disk shallow and half obscured, every- 

 where irregularly distributed and rather distant, showing, however, a tend- 

 ency to run in lines in various directions but never crossing one another and 

 generally transverse ; a straight, transverse, slightly impressed, broad sul- 

 cation free of punctuation a little in advance of the middle of the apical half 

 of the thorax. Scutellum much more coarsely and more bluntly punctate, 

 reaching barely two-fifths way to the tip of the abdomen. Henielytra with 

 the corium punctate like the thorax, but distinct and sharp throughout, the 

 puncta? along the costal margin clustered next the edge, leaving an open, 

 narrow, submarginal space free of punctuation. Whole body uniform 

 griseous. 



