126 



ME. E. M'LACULAN OJST NEW FOEMS, ETC., 



arises the long, triangular, yellow penis (or perhaps it is rather only 

 the penis-cover), the apex of which is somewhat produced and 

 notched, this member is concave beneath, and extends beyond the 

 appendices. 



Anterior wings varying from dark golden brown to blackish fuscous, 

 uniformly of one tint without markings (the 2 always the darker), 

 clothed with golden or fuscous pubescence (when the pubescence 

 is removed, the membrane appears to be sprinkled with somewhat 

 numerous, but indistinct, pale dots) ; fringes fuscous ; veins brown, 

 costa, subcosta, and radius darker, because thicker ; upper branch of 

 the ramus thyrifer, in that portion of it that forms the upper 

 boundary of the cellula thyridii, whitish, semitransparent. Pos- 

 terior wings smoky blackish, the veins darker; fringes blackish. 

 (PI. III. fig. 10, details.) 



I have examined six males and two females, sent to me by Mr. 

 Henry Edwards, of San Francisco. 



Ganonema, M l LacMan (Tr. Ent. Soc. Lond. ser. 3, vol. v. p. 253). 



In this genus should be placed Hydropsycha vicaria, Walker, 

 Cat. Brit. Mus. Neurop, pt. 1, p. 114, from Venezuela, the type 

 of which is a single unexpanded example with broken antennae 

 I have received a second individual from the same quarter, from 

 which I have drawn up the following description. A second 

 species is also from Venezuela. These do not differ sufficiently 

 in structure from the Malayan G. pallicorne to necessitate the 

 formation of a genus for their reception, notwithstanding the 

 wide difference in locality. I still think that the suspicion ex- 

 pressed by me (I. c. p. 255), that Asotocerus and Ganonema may 

 be identical, is well-founded, especially as the neural differences 

 in the fore wings are more apparent than real, inasmuch as the 

 lower branch of the ramus discoidalis is really only simply fur- 

 cate in G. pallicorne, the supposed additional sector belonging 

 to the ramus thyrifer ; hence there are the same number of sec- 

 tors in both genera. The neuration of the hind wings of both the 

 Venezuelan species is like that in Asotocerus, both being males ; 

 thus it is very probable that the differences are sexual, as I sus- 

 pected. In the form of the wings the South- American species 

 agree with Ganonema *. 



* A very closely allied genus is Calamoceras, Brauer, as would seem to have 

 been since recognized by its describer (Verh. Zool. Bot. Gesell. Wien, 1868, 

 p. 406). I cannot help thinking that the locality, " Gibraltar," given for C. 

 marsupus, has arisen from an error in labelling, and that the insect is really 

 exotic. 



