96 THE CANADIAN ENTOMOLOGIST 



caudad; lateral margins and pDstero-lateral angles as in the meson- 

 otum. Prosternal plate triangular, mesosternal and metasternal 

 plates somewhat V-shaped, all separated by considerable areas of 

 soft integument, which is covered by the large coxae. Front coxae 

 stout, slightly shorter than the pronotum and longer than the 

 middle and hind coxae, the middle pair being the shortest; each 

 coxa with a distinct ridge separating the ventro-anterior and 

 postero-lateral surfaces. Fore and middle femora and tibia? all of 

 nearly the same length, each being about as long as the pronotum; 

 front tarsi slightly shorter, middle tarsi slightly longer than the 

 corresponding tibiae; hind femora, tibiaeand tarsi of nearly the same 

 length, distinctly longer than the corresponding parts of the other 

 two pairs of legs. Abdomen widening from base to segment 5, 

 which is slightly wider than the head, narrowing again rapidly in 

 the last 3 segments. Cerci with 8 cylindrical segments, which 

 gradually lengthen distad. Ovipositor slightly shorter than the 

 hind femora, somewhat compressed, in profile tapering rapidly 

 from the base, the basal depth being about one-third of the length; 

 upper valves nearly straight, lower and inner valves distally up- 

 curved, apices of all acute. 



MEASUREMENTS (lengths in millimetres). 



Body Ant- 1st 1st 1st 2 id 2nd 2nd 



ex. ov. enn. fern. tib. tar. fern. tib. tar. 



Type 30 8.5 2.8 2.25 2.6 2.5 2.5 2.75 



Co.type 30 9.0 2.6 2.25 2.6 2.5 2.3 3.0 



Type 9 and cotype 9 : Sulphur Mt., Banff, Alta., 6500 ft., 

 June 29th, 1913, in the collection of the University of Toronto. 



The family Grylloblattidae differs from all the other families 

 of non-saltatorial Orthoptera in the possession of a large exserted 

 ovipositor of the Tettigonid type. Among other differential 

 characters possessed by these families are the following: 



In the Hemimeridae the tarsi are 3-jointed, the coxae small and 

 widely separated, the cerci unjointed. and the abdominal sternites 

 are overlapped by the tergites. 



In the Blattidae, the general form of the body is much broader, 

 the head is scarcely visible from above and is much narrower than 

 the pronotum, which is usually broader than long; the antennae are 

 longer than the head and thorax, setaceous and generally consist of 



