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Show 1877.] MR. A. G. BUTLER ON HETEROCEROUS LEPIDOPTERA. 379 the name of " scrotal projections " in the 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 Hycena 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.C. Eetractor clitoridis muscle. OS. Corpus spongiosum clitoridis ; a small artery is seen entering its base. CG*. Cowper's gland, opening into UGC, urino-genital canal, which is seen to extend forward from the junction of tbe urethra and uterus to the extremity of the clitoris, lying underneath the corpora cavernosa. UB. Urethra. B. Bladder. TJT. Uterus, formed by the junction of the two cornua. E.L. Round ligament of uterus. F.T. Fallopian tube, terminating in a fimbriated extremity. O. Ovary, lying in its peritoneal pouch. E. Eectum. A.G. Anal gland of left side, opening intojthe anal-gland pouch, which, in this position of the parts, is seen. S. Scrotal projection, seen from the side. Fig. 2. Posterior extremity of rectum and anal glands, seen from above. E. Eectum. A.G-.P. Anal-gland pouch, which communicates with A.G*, A.G, the anal glands. Between the anal glands of opposite sides a belt of glandular 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 Species1. By A R T H U R G. BUTLER, F.L.S., F.Z.S. (Eeceived 11th April, 1877.) (Plates XLII. & XLIII.) In my list of the " Lepidoptera of New Zealand," published 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 m y 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 M r . 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 a m able to recognize some of them ; but the 1 The types of new species have been presented to the collection of the British Museum. |