52 [March, 



timii, &c. Head, prothorax, and antennsB pale, the latter only slightly darker at the 

 sutures of the joints. The vague markings of the anterior-wings approach those of 

 rupta and othei's ; the pale dorsal blotch tolerably distinct. Anal parts pale yellow. 



In the $ the dorsal process is elongate-oblong in form, slightly narrowed 

 towards the base, the apex broadly truncate, nearly straight. The lateral lobes 

 small, hairy. Immediately beneath the dorsal process is a deeply furcate process. 

 Inferior appendages very large, the basal joint broad (viewed laterally) ; second 

 joint almost two-branched, the upper short and broad, obtuse at the apex, the lower 

 broad, but much produced, and also obtuse, the upper edge of this joint forming a 

 deep excision between the two branches. Lower penis-cover deeply concave. Penis 

 small (uncertain without dissecting the example), not produced. Sheaths in the 

 form of two short straight spines, each of which has nearly straight bristles at 

 its apex. Tooth of the 7th ventral segment nearly obsolete. 



9 unknown. 

 Length of body, 10 mm. Expanse, 32 mm. 



Central Italy (Vallombrosa, Costa , 1 ^^ in the Naples Museum). 



Once again it may be said that the species of Rliyacophila are 

 endless ! And in the present instance we have to deal with a species 

 that has apparently no very close allies, and of large size. In the 

 form of the dorsal process there is some analogy with rectispina. The 

 second joint of the inferior appendages has some resemblance to that 

 of evoluta, also to that of Hageni and ohliterata. The short penis- 

 sheaths with bristles at the tips are suggestive of the Group of Hageni, 

 but the other inner anal parts do not accord therewith (so far as can 

 be made out without dissection). The discovery of the ? might serve 

 to define the position. 



Fig. 1, apex of abdomen of (J from side ; 2, the same above ; 3, apex of furcate process beneath 

 the dorsal process, above. 



Lewisham, London : 



September, 1897. 



SOME EEMAEKS ON THE BAGOUS LUTOSUS, GxLi., 



AND B. GLABRIROSTRIS, Herbst {LUTULENTUS, Gth.), OF 



BRITISH COLLECTIONS. 



BY G. C. CHAMPION, P.Z.S. 



There is a good deal of confusion regarding these two species, 

 the only representatives of the genus on our list with dilated and 

 bilobed 3rd tarsal joint (apart from B. alismatis, Marsh.), in British 

 collections. All the specimens I have seen as yet (including those of 

 Stephens and Power) doing duty for B. lutosus are either B. glabriros- 

 tris, of which a large well-marked form occurs in the south of England, 

 or B. linodulus, Herbst. It is, therefore, highly probable that all the 



