1920.] 



70 



Mr, Peacock's specimen, I find the central portions (?'. e., the carina-likc Imipi- 

 tudiiial axes) and the apical margins of the 2nd and 3rd dorsal plates evidently 

 discoloured (sordidly testaceous), and this discoloration spreads also over part 

 at least of the 1st plate and occupies about a third of its apical margin. Tlie 

 following segments are almost entirely black, but even these have a very 

 narrow (linear) edging of clear white along their extreme apices. It may be 

 that these characters, which are certainly not very conspicuous and might 

 be easily overlooked, were regarded by Mr. Cameron as "individual," or as too 

 slight to require mention. It seems to me, howevei', that they are probalily 

 normal characters of the species, though some at least of them may be liable 

 to variation in individuals. 



2. The labrum — at any rate, so much of it as is not concealed by the 

 mandibles — appears to me to be not " fuscous," but white, like the clypeus, 

 etc. It is certainly so in Mr. Peacock's specimen, and I think in the type also ! 



3. The following seems to be an error of more importance. In the 

 Sytiopsis of Species (Monograph, vol. i, p. 186) it is stated that sharpi and 



" Stronrjijiogaster aJiavpi." — a, cross-nerve in lanceolate cell; h, appendiculation 

 of humeral cell ; c, ajiex of claw ; d, base of claw. 



JiJicis differ {inter alia) IVmu the other Stroiii/yUxjaster spp. in ha\ing 

 (i) "Pentagonal area indistinct" and (ii) "'Accessory nerve in the hind 

 wing appendiculated largely." Unless my eyes have deceived me, the first 

 of these statements is true only ol Jilicis, and the second only of sJiarjyil 

 '•'Distinctness" is a matter of degree, and opinions may diller about it. But 

 I think there can be no doubt tliat in JU ids the "accessory nerve'' (or, as I 

 should prefer to say, the "humeral cell ") in the hind wing is not in the least 

 appendiculated ! (fig., b). 



4. S. sharpi and filicis are correctly distinguished by Cameron from the 

 other species which he places in Stroyigi/lor/aster by the presence of a trans- 

 verse nerve crossing the "lanceolate cell." Bui he describes this nerve as 

 "oblique," and this it cannot properly be called, A really " oblique " cross- 

 nerve in the lanceolate cell occurs in many genera {I'uxonus, Eriucampa, 

 Dolcrus, etc., etc). But in sharpi and /ilicis the condition of things is quite 

 different, the cross-nerve being practically "perpendicular" (fig., «), and 

 looking so unlike that of' Taxonus, etc., that I have sometimes doubted 

 whether the two nerves were really homologous. It seems clear that an 

 " oblique '" nerve in this cell was originally a character of the whole Selaudriad 



