1909.] C. Betten : Notes on the Trichoptera. 235 



figure are shown two appendages of the penis, each consisting 

 of a long membranous body, terminated by a strong chitinous hook. 

 These appendages occur in all species of the genus I have observed, 

 but they are not shown in figures of the genitalia heretofore pub- 

 lished.' This is due to the fact that these appendages are generalh' 

 retracted ; they can be brought out easily b}^ boiling in caustic 

 soda. In this species these appendages are very long, reaching 

 nearly to the end of the penis. 



One male and one female from Kurseong {Annandale, May, 

 1906). 



Gen. Hydromanicus. 



This genus has been set apart from Hydropsyche mainly on 

 two characters — ^the intermediate tarsi of the female are not dilated 

 and the outer claws of the males are normal. Th2 latter character 

 I do not find of great value, for the claw may not be very abnor- 

 mal in Hydropsyche. As defined, the genus Hydromanicus includes 

 two groups which should in all likelihood constitute separate 

 genera. One of these groups corresponds ver}^ closely to Hydro- 

 psyche except that the tibiae of the female are not dilated. Judging 

 from the specimens before me, further points of difference are that 

 there are no appendages (Titillatoren) on the penis as in Hydro- 

 Psyche. Furthermore, the base of the 2nd anal vein of the fore wing 

 is in part obsolete, as is not the case in Hydropsyche. Regarding 

 both these points observations on the other species of Hydroma- 

 nicus are desirable. The second group, while it agrees with the 

 former in not having the intermediate tibiae of the female dilated, 

 differs from it and from Hydropsyche in several points. The shape 

 of the wings is decidedly different, the apex being markedly trun- 

 cate. This difference is particularly striking when the wings are 

 folded at rest. The jugum is well developed in the second group, 

 while in the first, as in Hydropsyche^ it is not so. The most striking 

 venational difference is in the hind wings where Sc and R, both 

 arch towards the sector in the region of cell ist R, and then 

 separate widely as they go to the wing-margin. In Hydropsyche 

 and in its nearest allies in Hydromanicus Sc and R, have their 

 tips fused (pi. XV, figs. 1,5, 13). 



Hydromanicus iruncatus, sp. nov. 



(PI. XV, figs. 5—8.) 



lycngth of body 8 mm. Expanse 17 — 19 mm. Head, protho- 

 rax, and mesothorax black with golden hair ; metathorax brown, 

 legs yellow, abdomsn black. Anten lai black with an oblique white 

 mark on each segment. Wings thickly covered with brownish 

 black and with yellow hair, the yellow dots being distributed 

 rather equally over the wings. SDme of the light spots are in the 

 wing membrane, as may be seen when the wing is denuded. Some 



' Ulmer's latest figures are exceptions to this. 



