56 LMarcli, 



Joannis, after examining the collection formed jointly by liis brother 



and himself, and that of Eagonot, finds nothing to support the idea 



that they are distinct. Eagonot's six specimens, like those which 



Stainton received from him, were bred from elm, some of them in 



1875, and are rather light reddish brown. Those in the de Joannis 



Collection were bred by Mons. I'Abbe L. de Joannis from larvne found in 



the departement du Morbihan on Primus spmosa, which is the only 



foodplant upon which he has found the insect. The general colour of 



the wings is brown, usually rather dark— one of the bred specimens 



was identified by Lord Walsingham as Coleoplwra hadiipennella. 



My object in treating of hadiipennella so fully is, if possible, to 



prevent others, who may be confronted with the difiiculties of the 



question, from being led to form erroneous conclusions, which may 



appear justified at first, but which will not stand the test of a fuller 



investigation. 



Norden, Corfe Castle : 

 September, 1910. 



ANOTHEE HUNDEED NEW BEITISH SPECIES OF DIPTERA. 

 BY THE LATE G. H. VERRALL, F.E.S. 



(Continued from Vol. xlviii, page 27). 



39. Hercostomus subsimplicipes, n. sp. H. nigriplanti siniillima, 

 sed tarsorum intermediorum articulo ultimo valde simpliciore. 



Col. Yerbury took a long series of this species at Porthcawl 

 in July, 1906, and their examination has compelled me to consider 

 them distinct from H. nigriplantis, though the only clear distinction I 

 can find lies in the almost simple last joint of the middle tarsi in the 

 male. if. sahlbergi is another very closely allied species, but has 

 spines beneath the basal joint of the middle tarsi. Some slight 

 distinctions from H. nigriflantis may exist in the less darkened 

 anterior part of the wings, while the wings have a blackish rather 

 than a brownish hue, though this is discounted by the fact that many 

 Diptera such as Beris genicidata, Sargus iridatus, &c., taken at Porth- 

 cawl in 1906, have an unusually blackish hue on the wings ; there 

 may also be a more greenish (instead of slightly dusted bronze) hue 

 on the thorax, and the genital lamellae may have a slightly shorter 

 fringe. The end joint of the middle tarsi in if. srdjsimplicipes is not 

 absolutely simple, but the dilation is so slight as to be very incon- 

 spicuous ; the thin spine at the end of the front tibia; is longer in 

 if. siibsimplicipes and the hind tibite less blackened at the tip, while I 

 think the face is narrower. 



