246 THE CANADIAN ENTOMOLOGIST. 



Now, regarding Microcentrus caryce. Fitch, and Cent melius Liebeckii 

 being congeneric, at the time I wrote the description of Liebeckii the 

 close relationship between my species and caryce was recognized, but as 

 Stal says that prothoracic horns are absent in Microcentrus, I looked 

 for some other modern genus in which to locate, temporarily, the species. 

 The Old World genus Centruchus seemed to fit it the best, and that 

 generic term was used although there was an extra discoidal cell which 

 must sooner or later place it in a separate genus. This has been done 

 by Fowler, who has described the genus Centruchoides. Of the two 

 species the neuration is identical, and the entire anatomy (other than the 

 presence of lateral horns in Liebeckii) is the same. I have before me the 

 example of Z2>(5(?c,^// mentioned by Prof. Baker as having aborted horns. 

 In my collection is an example with horns still more aborted, and while 

 in Washington a few weeks ago I found several similar examples in Mr. 

 Heidemann's collection. That gentleman informed me that he had taken 

 both forms together, with their larvas and pupse, while collecting. This 

 shows that the horns are variable, and, as I believe, in some cases 

 absent, as is true of Platycotis sagittal a, Germ., as recorded in my paper 

 " Fitch's types." 



Mr. Fowler has re-described the genus Microcentrus as Phau- 

 locentrus, and after stating that caryce, Fh., belongs to his genus, 

 describes and figures four new species, viz.: pileatus, proximtts, sordidiis 

 and cormdus : the first three closely related to caryce; the fourth, I 

 believe, bears the same relation to one of the others that Liebeckii bears 

 to caryce, 2i.x\dL I should not be surprised if his '^Centruchoides laticornis 

 was still another instance. 



In conclusion, I will say that the name Ledra perdita, in my opinion, 

 should be forgotten. The type was destroyed ; the description, which 

 might apply to any one of a dozen species of Centrotinse, drawn up from 

 an unrecognizable figure, and there is no possible way of determining 

 what insect the artist had in hand when he drew the figure from which 

 Amyot and Serville drew up the description of /^rd!'//c?. Let the name 

 be buried in oblivion. I believe caryce. Fitch, and Liebeckii, Coding, are 

 one and the same species. As Fitch's name has priority, the name 

 Microcentrus caryce, Fh., should stand, while the horned form may be 

 known as var. Liebeckii, Godg. 



* Centruchoides is not a MS. name. It is described in Fowler's work, page 159, 



