ME. H. M. BERNAED ON TWO NEW SPECIES OF EHAX. 361 



On two new Species o£ Bhax. By Henet M. Bernaed, M.A., 

 Cantab. (From the Huxley Eesearch Laboratory, Eoyal 

 College of Science, London.) (Communicated by "W. Peect 

 Sladen, See. Linn. Soc.) 



[Bead 2ncl February, 1893.] 



(Plate XXVI.) 



In furtherance of researches which I am now carrying on in the 

 above-mentioned laboratory on the Galeodidse, specimens were 

 obtained from the well-known naturalist, Herr Fric, of Prague. 

 Two of them were labelled " Aellopus, sp., from Yellore, Madras, 

 found by the missionary Lovendal." The third was unnamed, 

 but Herr Eric informs me that it was found near Greogh Teppe 

 by an engineer who had been with Greneral Anenkov during 

 the construction of the Transcaspian railway. The specimens, 

 however, were not the extremely rare Aellopus, but two different 

 species of Rhax, both of which appear to be new. 



Ehax nigeocincta, n. sp. (PL XXVI. fig. 2.) 



There are two specimens, the sexes of which are not easy to 

 determine without dissection. One has a very much distended 

 abdomen ; but this I have found may be due to a large meal, 

 and does not necessarily mean that the animal is a pregnant 

 female distended with eggs. Again, the absence of flagella on 

 the mandibles is no criterion of sex ; for although it is generally 

 stated that these organs are confined to the males, I have found 

 them on a specimen of Qaleodes grcecus, Koch, which, on dissec- 

 tion, proved to be a female. 



The normal length is about 1| inch, while the specimen with 

 distended abdomen measures 2 inches. The nearest species I 

 can find is R. annulata, Simon *, which, however, is only 18 millim. 

 long. This animal has very nearly the same black markings 

 round the limbs as I have figured for Bliaco nigrocincta, only the 

 rings on the second, third, and fourth legs in the latter are on the 

 tibia, and not on the femur as described for B. annulata ; and the 

 second ring on the third leg is on the metatarsus, and not on the 

 tibia . Simon makes no mention of the very conspicuous triangular 

 white patches at the anterior margin of the " head." 



Simon's description of the colouring of the abdomen in B. an- 

 * Bull. Soc. Zool. X, p. 2. 



