and fourth, the fourth being about two-thirds as long as the third, the 

 fifth about two-thirds as long as the second. 



Length, If — 2| D:im. 



While on the subject of fleas, I may mention that since writing 

 the short note in the last volume of our Magazine (xxvii, p. 170), on 

 Ti/phlopsi/lla assimilis, I have received, through the kindness of 

 Messrs. Bignell and Piffard, numerous examples of T. musculi, which 

 may be known at once from assimilis by the fringe of black bristly 

 hairs along the upper edge of the tibiae, as well as by the four genal 

 spines, and the black scattered hairs of the upper surface. 



St. Ann's, Woking : 



February 15fh, 1892. 



SYNONYMIC A L NOTES ON CYNIPID.E AND FORMICIDJS. 

 BY PETER CAMERON, F.E.S. 



Andricus Hartigii, Foerster.— In the Wiener Ent. Zeit., ix, p. 97, "Von Dalla 

 Torre changes this specific name to Foersteri, on the ground of there being an earlier 

 Andricus Hartigii, Marshall. This re-naming is, however, quite unnecessary, 

 inasmuch as Mr. Marshall has himself pointed out in the same volume (Ent. Mo. 

 Mag., iv, 224), wherein he described Andricus Hartigii, that it was founded on 

 Diastrophus ruhi. 



Pediaspis sorhi, Thclxhem. — I am of opinion that with the dimorphic CynipidcB 

 the only satisfactory way of nomenclature is to use the earliest name under which 

 either the agamic or bisexual form was described. Under this rule, sorhi, Tisch. 

 (1852), must take precedence over aceris, Foer. (1869), notwithstanding that it is 

 now known that both forms are found on Acer. But there is an earlier name than 

 either, namely, acerincB, Bremi (1847). It is true that Bremi (Beitr. z. e. Mon. d. 

 Gallmiicken, p. 64) only describes the gall, but his description leaves no doubt as to 

 which species he meant : " Cynips acerince, lebt in erbsen-grossen, kugelrunden 

 Grallen, die zalilreich an der unter Blattflache sitzen." 



About eight years ago, when I was working at ants, I wrote a short paper on a 

 small collection of ants, brought by Mr. Edward Whymper from the Andes. The 

 existence of this paper had completely escaped ray memory until its publication 

 recently in Mr. Whymper's travels in the Andes. The following species requires to 

 be re-named : Camponotus Mayri, Cam. ; the genus HoJcoponera also requires a 

 fresh name, as the name has been used (1887) by Mayr for a different species ; and 

 Pheidole monticola = P. Cameroni, Mayr. Not having been paying any attention 

 to ants within recent years I do not know if the two first mentioned species have 

 been described elsewhere ; and merely publish this note to explain how the names 

 described subsequent to the writing of the paper have been used. 



Sale, Cheshire : 



January 8th, 1892. 



