4O2 ENTOMOLOGICAL NEWS. [Nov., '17 



similarity between the antennae extends to the neck plates, and 

 other structures as well, in the Embiids and Grylloblattids, and 

 in these features also, the Grylloblattids differ from Blattids 

 (which some investigators would consider as their nearest rel- 

 atives). 



In conformity with the general depressed condition of the 

 body, the head of Embia (Fig. 6) is somewhat flattened, but 

 aside from this fact, and the modifications which the Embiids 

 have developed along their own lines, the head of a Grylloblat- 

 tid (Fig. 9) is somewhat like that of an Embiid (although both 

 differ from the Blattids in this respect) and is quite like that of 

 the Phasmid Timema (Fig. 8) in outline. Not only are the 

 heads of the Grylloblattids anad Phasmids more prognathous, 

 like that of an Embiid (while the head of a Blattid is more 

 opisthognathous), but the outline of the compound eyes, their 

 extent upward along the sides of the head, the point of at- 

 tachment of the antenna in relation to the eyes and to the base 

 of the mandibles, etc., are infinitely more like those of an 

 Embiid in the Phasmids and Grylloblattids, than they are like 

 those of a Blattid, as may readily be seen by comparing Figs. 8 

 and 9 with Fig. 6 and then with Fig. 2. 



The agreement in structure between the antennae of Gryllo- 

 blatta and Embia is extremely striking, but the similarity be- 

 tween the neck plates and prothoracic sclerites of these insects 

 is no less remarkable (and in these points of similarity both 

 Embiids and Grylloblattids differ markedly from the condition 

 found in the Blattids). If one will cover the heads of the in- 

 sects shown in Figs. 6 and 9, so as to concentrate his attention 

 upon the plates behind the head region, he will be immediately 

 struck with the remarkable agreement between the sclerites of 

 the Grylloblattids and Embiids an agreement extending even 

 to the minutest details! Thus, the anterior transverse region 

 Pi in the pronotum of Grylloblatta (Fig. 9) finds its counter- 

 part in the region designated as Pt in the pronotum of Embia 

 (Fig. 6), the epimeron Em is very similar in both insects, and in 

 the episternal region of both Embia and Grylloblatta, there is 

 marked off a sclerite labeled e, which is demarked by a curved 

 suture in the two insects. 



