198 THE CANADIAN ENTOMOLOGIST. 



Fig. II. — Labium; a, palpus j b, mentum ; r, 



Fig. 12. — Labrum ; a, four small papillte ; b, four strong teeth; 

 c, chitinous support. Enlarged one hundred times. 



Fig. 13. — Hairs of different types; a, from antennae and elsewhere; 

 b, legs, etc. ; c, palpi ; d, posterior border of the pleurites. 



CORRESPONDENCE. 



FURTHER NOTES ON THE PSYLLID^. 



If I might judge of the feelings of the readers of the Canadian 

 Entomologist by my own, I should say that they were much obliged to 

 Prof. Riley for his note on the Psyllidge, and for the accompanying illus- 

 tration. Figure 7 of that illustration is, however, imperfect, in that (i) it 

 fails to show the feet of the insect — an important consideration as regards 

 Westwood's classification ; (2) it gives the appearance of the dried galls 

 on an apparently fresh leaf : the fresh galls are much more pear-shaped 

 — in many instances they are nearly globular; (3) the section of the gall 

 does not show the hardened inner roof of the cavity or cell. 



I hope Mr. Riley will pardon me if I say that he indulges a tendency 

 to be needlessly exact. When I wrote my description (and it proves to 

 be the first description published) of the Psylla under our notice, I used 

 the indefinite article a. In my subsequent note, when the insect had been 

 distinguished by Prof. Riley's remarks — at any rate, when it was the 

 insect under our consideration, I wrote the. The Professor seems to 

 think that the readers of the Entomologist will mistake my meaning. I 

 feel sure that they will not. 



With regard to the term Ceitidis, Endlichter and De CandoUe (and 

 the latter is undoubtedly a great name amongst Botanists) could scarcely 

 have known Latin better than Pliny ; and one cannot help feeling that, as 

 regards Ceitidis, "they went — well, to use Mr. Mantalini's gentle euphe- 

 mism, " to the Bow-wows " for their Latinity. The nettle-tree, perhaps, 

 was useful to the Celtic females, as the fig-tree was to Mother Eve ; but 

 the tracing of Ceitis, gen. Ceitis, to Kc/tidos, genitive of Keltos, is indeed 



