1877.] MR. A. G. BUTLER ON HETEROCEROUS LEPIDOPTERA. 379 



the name of "scrotal projections" in tlie paper. Below these is tha 

 bare perineal integument with a median groove which may represent 

 .the vulva. Lowest of all is the clitoris, surrounded by its prepuce, 

 and perforated at the extremity of the glans by the urino-genital canal. 



Plate XLI. 



Fig. 1 . Female generative organs and extremity of rectum of Hyama crocuta. G.C 

 Glans clitoridis perforated at its extremity by the urino-genital canal. 

 P. Prepuce surrounding the glans clitoridis. C.C. Corpora cavernosa 

 clitoridis, separating posteriorly to form the crura. E.G. Retractor 

 clitoridis muscle. C.S. Corpus spongiosum' clitoridis ; a small artery^ 

 is seen entering its base. CG. Cowper's gland, opening into UGO, 

 uritio-genital canal, wliich is seen to extend forward from the jimetion 

 of the urethra and uterus to the extremity of the clitoris, lying under- 

 neath the corpora cavernosa. UE. Urethra. B. Bladder. UT. 

 Uterus, formed by the junction of the two cornua. R.L. Round liga- 

 ment of uterus. F.T. Fallopian tube, terminating in a fimbriated 

 extremity. O. Ovary, lying in its peritoneal pouch. R. Rectum. 

 A.G. Anal gland of leit side, opening intojthe anal-gland pouch, which, 

 in this iwsition of the parts, is seen. S. Scrotal projection, seen from 

 the side. 



Fig. 2. Posterior extremity of rectum and anal glands, seen from above. B. 

 Rectum. A.G. P. Anal-gland pouch, which communicates with A.G, 

 A.G, the anal glands. 



Between the apal glands of opposite sides a belt of glandidar follicles 

 is seen to cover the fundus of the pouch. 



2. On two Collections of Heterocerous Lepidoptera from 

 New Zealand, with descriptions of new Genera and 

 Species'. By Arthur G. Butler, F.L.S., F.Z.S. 



(Received 11th April, 1877.) 

 (Plates XLII. & XLIIl.) 



In my list of the " Lepidoptera of New Zealand," puhlished in 

 the Insect portion of the ' Voyage of the Erebus and Terror,' I was 

 unable, from the small attention which up to that time I had paid to 

 the Heterocera, to determine critically the correct genera to which 

 many of Walker's species were referable ; I had, moreover, little 

 time at my disposal to go through the whole collection with Guenee's 

 descriptions ; and therefore I was compelled merely to introduce them 

 into their places, in the belief that this author had made strenuous 

 efforts to determine the species described by Walker. That this belief 

 was (to all appearance) unsupported by fact will, I think, be made 

 sufficiently clear in the following synonymic revision of the two small 

 collections recently brought to England by Dr. Hector and Mr. J. 

 D. Enys ; I can only discover two or three instances in which species 

 here enumerated have been identified, and in the case of Nitocris 

 comma incorrectly. 



M. Guenee says, " I am able to recognize some of them ; but the 



' The types of new species have been presented to the collection of the British 

 Museum. 



