312 Dr. W. T. Caiman on the 



but remain separate as two long tapering lobes, just as in 

 Dipseiidopsis, which shows further resemblance in the cross- 

 barring and sense-organs of these lobes. 



Indeed, many characters point to tlie close relationship of 

 the Lepidoptera to the Trichoptera. But the mouth-parts of 

 such forms s.s Micropletyx nnd Eriocejyhala suggest mandibu- 

 late ancestors within tlie Lepidoptera, so that it is extremely 

 improbable that in Dipseiidopsis the proboscis of the first 

 maxillae, which have already become elongated, is really 

 homologous with the proboscis of the Lepidoptera. This 

 is a case of parallelism as opposed to homoplasy, having 

 regard to the close phyletic relations of the Lepidoptera and 

 Trichoptera. Other instances of great interest are given by 

 Dr. Willey in his book on " Convergence.'" 



XXXYI. — Note on the Brachyuran Genera Micippoides and 

 Hyastenus. By W. T. Calman, D.Sc. 



(Published by permission of the Trustees of tlie British Mus'^um.) 



Micippoides angustifrons , A. M.-E. 



Micippoides angustifrons, A. Milne-Edwards, Journ. Mus. GodefFroy, 

 Bd. i. Heft iv. p." 78, pi. i. figs. 2-2 c (1873) ; Rathbun, Trans. Linn. 

 See. London, (2) Zool. xiv. p. 256, pi. xviii. fig. 14 (1911). 



I£i/cistenus andrewsi, Ca\m&n, Proc. Zool. Soc. London, 1909, p. 711, 

 pi. Ixxii. figs. 6 & 7. 



The figure published by INliss Rathbun has made me aware 

 that the specimens from Christmas Island which I described 

 under a new name belong, with little doubt, to Milne- 

 Edwards's species. While I cannot attempt to excuse my 

 oversight^ it may be of interest to call attention to the 

 characters in which the Christmas Island specimens differ 

 from the original figures. I have also compared them with 

 four old dried specimens in the Museum collection from the 

 Fiji Islands and "Australian Seas/' doubtless the specimens 

 examined by Miers in preparing his ''Classification of the 

 Maioid Crustacea '^ (Jomn. Linn. Soc, Zool. xiv. p. 658, 

 1879). In all of these, as in !Miss Rathbun's specimen, the 

 rostral spines are less detlexed than in JNlilne-Edwards's 

 figure, while in the Christmas Island specimens they are 

 rather more slender and more curved upwards at the 

 tip than in any of the others. More important are the 

 differences in the oi'bital rej^ion. Milne-Edwards figured the 



