132 THE CANADIAN ENTOMOLOGIST 



margin, and is nearly if not quite, symmetrical. It is separated from the sternal 

 region only by a suture, there being no distinct pleural membrane (Figs. 8 and 

 9). The sternal region (Fig. 2) is unique among Orthopteroid insects in being 

 divided into three sclerites, a basal plate, the true "sternite," and two disto- 

 lateral "coxites," which are connected with the sternite by distinct articulations. 

 The sternite is of nearly the same size and form as the tergite, although with a 

 somewhat more decidedly arcuate hind margin and is slightly asymmetrical, 

 being longer on the right side than on the left. The coxites are remarkably 

 asymmetrical and different in form. Both are roughly triangular and bear well- 

 developed styli at their apices. The left coxite (cxl) is a large scoop-shaped 

 plate, whose base extends from the left pleural suture to a point well to the 

 right of the median line. The right coxite (cxr) is of about the same length, 

 but much less than half as broad at base, and is confined to the right side. Its 

 upper margin bears a prominent chitinous process (cxp) directed ento-caudad. 

 Both coxites and styli are thinly pubescent, like the general body-surface, and 

 the styli also bear a few short bristles, chiefly toward the apices. 



The 10th segment, as in the female, is much smaller than the 9th, but is 

 fairly prominent. The tergite as viewed from above is symmetrical and trape- 

 zoidal in form, being narrowed distally to a truncated apex. Viewed from 

 behind, however, its lateral lobes are seen to be produced mediad beneath the 

 cerci and paraprocts (lamin(E subanales) into a pair of free, unequally developed 

 arms. The left arm is the longer and is entirely chitinized, except at the tip, 

 which is slightly expanded into a little rounded pad. The right arm is shorter 

 than the left, chitinized only at the base and lacks the pad ; having the appearance 

 of an aborted structure. At the base of the cerci, which are similar to those of 

 the female, there is a small ventral basipodite. The supra-anal plate (sa) or 

 "epiproct" is vestigial and feebly chitinized. The paraprocts, which are situ- 

 ated on each side of the anus, are also poorly developed and unchitinized, though 

 pubescent. There is no 10th sternite. 



The Genitalia. 

 The phallus is bulky and irregular, resembling in general appearance 

 that of certain Blattidse, and also recalling that of the Phasmidae. It consists 

 of two large lobes separated by an oblique fissure, extending from about the 

 mid-ventral line to the left side at the base of the 10th tergite (Figs. 3 and 4). 

 As seen in Fig. 2 both lobes project well behind the posterior margin of the 9th 

 sternite, the right lobe terminating in the space between the two coxites, while 

 the left lies chiefly in the concavity of the left coxite. The right lobe bears upon 

 its dorso-caudal surface a heavily chitinized prominence (pm), divided into two 

 irregularly folded parts, bearing several blunt, tooth-like processes. Just above 

 it are two nearly horizontal plates (Im), whose freely projecting outer (right) 

 extremities are bent backwards towards the chitinous prominence just de- 

 scribed. These parts, together with the right coxa, with which they are 

 associated, appear to form the clasping apparatus, in which the left arm of the 

 10th tergite may perhaps be included. The exposed part of the right lobe is 

 chitinized and pubescent. 



The left lobe is entirely membranous except a small, ventral patch, which 

 is chitinized and pubescent. It is remarkable in being produced into a long, 

 coiled membranous tube, which apparently has no opening but is an evaginated 



