Vol. XXVJii] ENTOMOLOGICAL NEWS. 409 



The Grylloblattoid, Phasmoid and Orthopterous insects form 

 a third superorder (the Panorthoptera), in which the head is 

 frequently hypognathous, and the lateral cervicals usually do 

 not touch in the median ventral line. The ventral cervicals 

 are usually absent, but when present may be of either of the 

 types mentioned above. The tarsi, typically pentamerous, may 

 be reduced to four or three segments, though a series of five 

 pads on the ventral surface is frequently retained, indicating 

 that the pentamerous condition has not been long lost. The 

 group is typically an ovipositor-bearing one and styli fre- 

 quently occur in males. All of the insects previously men- 

 tioned belong to a single section (the Plecopteradelphia) con- 

 nected by intermediate or annectent forms, and apparently 

 descended from ancestors not very different from recent Ple- 

 coptera. 



Since sending the foregoing discussion to the editor of the 

 "News" an extremely important paper by Pantel, 1917 ("A 

 Proposito de un Anisolabis Alado" in : Mem. R. Acad. Cienc. 

 y Artes, Barcelona), has been published, in which he figures a 

 series of Dermaptera including Allostethus, Labldura and Anis- 

 olabis, which furnishes an unusually clear illustration of the 

 gradual fusion of the posterior portion of the eutrochantin 

 (Fig. 5, be}, with the lower portion of the prothoracic pleur- 

 on, while the anterior portion of the eutrochantin (Fig. 5, a), 

 remains free to form the so-called trochantin of the higher 

 forms, thus offering a very conclusive demonstration of the 

 claim made in a preceding 1 discussion concerning the fusion 

 of the posterior portion of the eutrochantin with the lower 

 portion of the pleural region, etc. 



In the appended list the abbreviations used in Plate XXVII 

 are quite fully explained, so that it is unnecessary to discuss 

 further the additional points of similarity in the groups of in- 

 sects here shown, since homologous structures bear the same 

 label throughout the series. 



ABBREVIATIONS. 



a, b, c Sclerites composing; the trochantin-like region called the eutro- 

 chantin, which intervenes between the coxa and the plenral 



