282 



THK ENTOMOLOGIST S RECOKIJ. 



(6) The Genital Plate of the volume on Noctiiulae, the term for a 

 plate leading to the genital tube, is not mentioned in the more 

 detailed remarks on female armature. (7) Nor is the Lodix, the name 

 of a plate which covers the last named plate, referred to. 



It is to be regretted that an error has crept in, quite inadvertently 

 we are perfectly sure. 5till it is necessary to early call attention to 

 it as it appears somewhat unjust to some of our foremost workers in 

 the investigation of these organs. " The f/nathus of Chapman," is a 

 byword with workers on the genitalia, but on page xx. occurs " The 

 Gnathos. — Pierce," and again on page 81 "Gnathos: (Gr. gnathos, the 

 lower jaw) .' . . . P(ierce)." On page xxi. we read " This organ 

 (the gnathos) has appeared to me to be of such importance as to form 

 two primary divisions of the (ieotuetridae according as it is present or 

 absent and for these divisions I propose the names Gnathoi and 

 Agnathoi." Turning to Wyttsmann's Genera Insectontui, fasc. 103, 

 p. 6, Prout (1910), we read : "In particular, Dr. Chapman {in litt.) 

 considers that a dichotomous arrangement is indicated thus : 1° tenth 

 abdominal segment clearly marked off from ninth, and distinctly 

 articulated into dorsal and ventral pieces, suggesting a shark's jaw 

 (typified by Kranitis, but embracing numerous (Knochrominae as well as 

 Boarniinae of Hampson), 2° without this character." 



Again in the knt. Becord, vol. xxiii., p. 287 (1911), Chapman 

 writes : — " The name Scaphimn as used erroneously is sometimes 

 perhaps applied to the " subscaphium," but more usually to the 10th 

 abdominal sternite, and this piece, if one objects to " 10th abdominal 

 sternite " as being a description and not a name, is in want of a short 

 name. If so, I would call it the " gnathus " (7^a6'os), anglicised 

 " gnath," in allusion to its so often resembling a lower jaw, as in — " 



The question of the term "gnathos" is still further complicated. 

 In October, 1905, in the Transactions of the Entomolotjical Societij of 

 London, Mr. G. T. Bethune-Baker published " A Monograph of the 

 Genus Ot/yris," m which he introduced the term " Falces " for similar 

 structures in this genus of Lycaenidae. On page 270 we read, " The 

 tegumen of the whole of the Lycaenidae is furnished with a pair of 

 hooks at the lower extremities of the lateral lobes, these I have desig- 

 nated by the term Falces (falx = a reaping-hook)." A careful compari- 

 son and consideration of the figures on the plate accompanying this 

 paper (plate xv.) with the drawings in Mr. Pierce's book will readily 

 convince one that these structures are the same, and hence as the term 

 " falces " was introduced so long ago as 1905, it has priority over the 

 term "gnathos," which will fall. 



[To be concluded.) 



Correction : — -In my notes on collecting in the Tyrol (p. 248), I 

 regret to find that an error was made in recording Erehia nerine from 

 near Gamagoi as these prove to be a dark form of Erehia goante. I find, 

 hoAvever, that one K. nerine was taken at Bormio on July 8th, and 

 another at Trafoi on July 11th. — Douglas H. Pearson. 



