1904.] 247 



descriptions (which is not altogether easy, since llartig knew the 

 (^ only of his eradiatus, while the eradiatus described by Thomson 

 is a ? ) it would seem that the only tangible distinguishing cha- 

 racter lies in the colour of the femora. In eradiatus these should 

 be black except at the extreme apex, while in drewseni they are 

 described as "yellow beneath." If this distinction, which seeras 

 rather varietal than specific, is reliable, I have taken ^ ^ oi 

 drewse7ii in Warwickshire and of eradiatus in Surrey and Kent, 

 and have also seen ? ? of eradiatus from various British localities, 

 but no ? which I could call drewseni as described by Thomson. 

 Herr Kouow, however, considers all my ^ ^ to be probably 

 drewseni ; and although in my own collection I keep for the 

 present the two forms apart and distinguish them (as in my 

 tables) as eradiatus ? and drewseni ?, I do this without any con- 

 fidence that they are really different species. Structurally they 

 seem quite identical. 



Priophorus tristis. — A.11 my British specimens of this are ? ? . I call 

 them on Konow's authority tristis rather than brullcei, which is 

 the name adopted (with tristis as a synonym) in Cameron's 

 Monograph. It is said there that the third antennal joint is " a 

 little longer " than the fourth ; but in my specimens (as in all 

 the allied species) it is distinctly a little shorter. Still, taking 

 Cameron's description of hrullrei as a whole, I cannot doubt that 

 it refers to the present species. 



Leptocercus. — The name Camponiscus, Newm., denoted a larva only. 

 On this ground Konow rejects it, and adopts the name given by 

 Thomson to the imago. 



Lept. duplex, Lep. (= apicalis, Brischk.). — This, I suppose, is Mr. 

 Cameron's Camponiscus apicalis ; only he calls the stigma 

 "brownish-testaceous," while in all my specimens it is practically 

 colourless. 



Lept. luridiventris.— There must surely be an error in Mr. Cameron's 

 measurement of this little insect. He calls it " 5-G lines long "— 

 the same length which he gives for Tenthredo livida ! I make it 

 at most 5 mill, (not linos !) long, and duplex (" 3| lines " according 

 to C.) just a trifle longer. 

 Passing now to the Nematides with petiolate humoral area let us 



begin with Dincura. This genus is distinguished from other Nematides 



by two peculiarities ; («) the basal n. in the fore-wings is not received 



