42 ENTOMOLOCilCAl. NEWS. [Feb./lQ 



Probably one of these is Rhopalictus chalcozonia Sichel, of 

 which Sichel said that he had a series from Mexico, but lacked 

 time and space to describe it. Such time and space were never 

 found, so far as I can discover, and the name remains nude. 

 Halictus konozvi Ducke is the same as A^. cieprifrons, as Ducke 

 himself stated. Smith, for no valid reason, described the in- 

 sect as a Megalopta, so Ducke's mistake is not surprising. I 

 have examined Smith's type. 



From Chanchamayo, Peru {Rosenberg), the U. S. Nat. 



Museum has specimens of A^. lampter (X^achal) and A^. lepi- 



dodes (Vachal). The latter was described from Bolivia, and 



is new to Peru. I have one from Mapiri, Bolivia, sent by 



Schrottky. 



• <•» ■ 



Notes on the Phylogeny of the Orthoptera.* 



By G. C. Cramtton, Ph.D. 



Practically all of those investigators who have recently dis- 

 cussed the phylogeny of the Orthoptera, agree in deriving them 

 from Blattid-like ancestors. In a number of papers dealing 

 with a phylogenetic study of various structural features in in- 

 sects related to the Orthoptera, I have maintained that the 

 Plecoptera rather than the Blattidae are more like the ancestral 

 stock from which all of these forms are descended, and I 

 would briefly summarize the reason for so thinking in the fol- 

 lowing discussion. 



The appended diagram is offered to aid in visualizing the re- 

 lationships of the different lines of descent here discussed ; but 

 it should be borne in mind that such a diagram should be rep- 

 resented in three dimensions rather than in one plane, if the 

 real relationships of the different groups are to be correctly 

 portrayed. Thus the three lines of descent depicted as though 

 clustering about the Blattids should be represented as though 

 springing off from the main stem at right angles to the plane 

 of the other groups, since these larger groups approach one 

 another from different angles, and the same holds true for 

 the various branches within a larger group ; but the diagram as 

 given will serve for all practical purposes. 



The "Lepismoid" insects such as Lepisma, Nicoletia, etc., 

 (with which such forms as Machilis might be likewise includ- 



*Contribution from the Entomological Laboratory of the Massachu- 

 setts Agricultural College, Amherst, Mass. 



