]^98 [September, 



the few species j^et discovered in these two genera, I was soon able to 

 determine im^ captures for certain as the sexes of tenella Kl. ( = t/h'ae 

 Kalt.), — the onlj^ Blennocampid in which the d 6 and $ 5 differ as 

 above described in the colour of the abdomen, and the onl}^ one known 

 to be attached to the Lime ! Its larvae Avere found mining the leaves of 

 that tree by Kaltenbach, who gave in his " Pflanzenfeinde " (1874, p. 78) 

 a full account of their characters and habits, and was also the first author 

 to describe togetlier both sexes of the imago pointing out the difference 

 in their coloration, so that it seems rather a pity that his Avell-chosen 

 name for the species, viz. tiliae, should have to yield pi'ecedence to 

 Klug's 60-3^ears-earller tenella, the description of which ov\y suits the 

 S and was founded on a single specimen. The $ imago seems to have 

 been first described by Lepeletier, who called it (in 1S23 and again in 

 1S30) Jiylotomoicles, hut did not know the 6 nor the larva. Thomson 

 in 1872 desci'ibes both sexes correctly, but calls them " temiicornis 

 Hartig," and he does not seem to have known the larva nor its food- 

 plant. He s])eaks of the insect as rare, and it is }:)robabl3' not common 

 an3rwliere, though ])retty widety distributed, since it has occurred in 

 Germany, France, Scandinavia, and now in Britain. 



Although my specimens are, I believe, the first actually taken in 

 this country it seems to have existed here for at least -40 years, since 

 Cameron (Mon. vol. i, p. 256) notes that he "received from Stainton a 

 mined leaf of Tilia enropaea'''' which was " A^ery probably " the work of 

 " Jilennocampa tiliae Kaltenbach, a species closely related, if not 

 identical with, if one might jvidgc from the description, B. assimilis.'''' 

 It is evident, however, from this, and from his fui'ther remarks on the 

 subject, that he did not rear the species, and did not thoroughly under- 

 stand Kaltenbach's description. He corrects, indeed, a mistranslation by 

 Andre of certain words in that description ; but he follows Andre in 

 failing to note that Kaltenbach had described the d" 6 and 5 $ as 

 coloured differently, and in consequently treating the red abdomen of the 

 S as a character belonging to both sexes of the species. 



Tilia enropaea is not, I believe, a really native British tree, and it 

 is one to which even elsewhere ver}' few Sawflies of any kind are 

 attached. In fact, Enslin only mentions three such as occurring on 

 it in " Middle Europe," namely Caliroa annulipes, Pristipliora riifi- 

 cornis, and Scolioneura tenella, and of these (which all occur in Britain ) 

 the last only seems to be attached to it exclusively. 



Lastly, it may be noted that such a difference of coloration as 

 exists between the sexes of this species is very unusual in Sawflies. 

 Nearly always either the J c5' and 9 $ are coloured alike, or, if they 



