Vol. XX vi] ENTOMOLOGICAL NEWS 339 



Anisolabis; the relative size of the nota is much the same as 

 in Anisolabis, and the anterior sclerite pt (Fig. i) is apparent- 

 ly also represented in the pronotnm of the Dermaptera. The 

 fact that the pronotum (pr, of Fig. 2) does not overlap the 

 pleural region to any extent, while the mesonotum (mes) and 

 metanotum (met) do overlap the pleural region, is strongly 

 suggestive of the condition found in Anisolabis; and, indeed, 

 the dorsal sclerites of Grylloblatta are more nearly like those 

 of wingless Dermaptera than any other insects which I have 

 examined. 



The pleural region of the thorax presents some characters 

 suggestive of the Dermaptera, and also of the Gryllids, but 

 on the whole, the pleural region is more like that of the Isop- 

 tera than any other insects. The prothoracic episternum (es, 

 Figs. 2 and 3) and epimeron (em) are much like those of the 

 Dermaptera, but the presence of the clearly demarked sclerite 

 bp is a feature which does not occur in any of the pterygote 

 insects which I have studied, and is suggestive of the condi- 

 tion found in apterygote forms. The lateral cervical s (Ic, of 

 Figs. 2 and 3) are not divided into a number of smaller plates 

 as in the Dermaptera, but rather resemble those of the Grylli- 

 dae, and even slightly resemble those of the Isoptera, except 

 that they do not meet in the mid-ventral line as in the Isop- 

 tera and are not subdivided as in the latter insects. 



The episterna and epimera (es and em) of the meso- and 

 metathorax are quite like those of the Dermaptera, and are 

 likewise somewhat similar to those of the Isoptera (which also 

 resemble the Dermaptera). The "laterosternite" Is (Figs. 2 

 and 3) occurs in the mesothorax of the Dermaptera and Grylli- 

 dae, but in the metathorax of these insects it is indistinguish- 

 ably united with the sternal region. Only in the Isoptera is the 

 sclerite Is present as a distinct plate in both meso- and meta- 

 thorax, as is also the case in Grylloblatta. The shape of the 

 trochantin, tn (Figs. 2 and 3), and its division into an anterior 

 and posterior region by an oblique suture, is characteristic of 

 the Isoptera (and also of the Blattidae, to which the Isoptera 

 are nearly related). 



