1881.] REV. O. p. CAMBRIDGE ON A NEW SPIDER. 683 



the genital aperture, by the development of which alone its maturity 

 could have been determined. 



It seems to me that this Spider is of the same species as two Brazi- 

 lian males in my collection of Mijgale versicolor, C. L. Koch, of 

 which the male only has, as yet, been described. There can belittle 

 doubt, however, that Koch's Spider is not of the same species as 

 the Mygnle versicolor of Walckenaer, of which this latter author 

 had described previously only the female ; and it has thus become 

 necessary to rename Koch's species. I have therefore, in the present 

 paper, described and figured the Spider lately living in the Zoological 

 Gardens under the specific name of stradlingi, after Dr. Stradling, 

 by whom it was brought to England. Some specific characters, and 

 figures of the palpi, taken from one of the male spiders above mea- 

 tioned, are also added. 



Order Araneidea. 

 Fam. Theraphosid^. 



Genus Homceomma, Ausserer. {Mrjgale, Walck. ad partem.) 



HoMCEOMMA stradlingi, sp. w. (Plate LX.) 



Mijgale versicolor, C. L. Koch (non Walck.). 



Homceomma versicolor, Auss. ? 



Length of the female 23 lines, to the end of the falces 27 lines ; 

 length of the cephalothorax 10^, breadth at the widest part 9 lines ; 

 greatest expanse of the legs (diagonally from the extremity of each 

 of the first pair to the extremity of the opposite leg of the fourth 

 pair) 6 inches. 



Cephalothorax longer than broad, rising gradually but slightly 

 from the posterior to the anterior part ; normal indentations strong ; 

 that at the thoracic junction deep and curved, the convexity of the 

 curve directed backwards. Its colour is brown-black, covered with a 

 short dense pubescence ; and with a few long, erect, bristly foxy- 

 grey hairs on the eye-eminence, which is of moderate height, convex, 

 of a transverse-oval form, and placed close to the fore extremity of 

 the caput. 



Eyes subequal, forming a transverse oblong figure, the length 

 nearly about double its width. Their general position is similar to 

 that of a great number of others of this family ; and a better idea 

 may be obtained of it from the figures (3, 4) than by any descrip- 

 tion. Among other slight differences in the relative size and posi- 

 tion of the eyes of Spiders of this group, Ilerr Anton Ausserer 

 lays stress upon that afforded by the greater or less height of those 

 of the central pair in relation to the fore-laterals. This may be 

 ascertained by looking at the Spider from in front and holding it 

 level, and on a level with the eye ; then connecting the central pair by 

 a transverse line touching their fore margins, and continuing this line 

 on each side, observe whether it passes above or cuts the fore-lateral 

 eyes. In the present Spider a line so drawn would as nearly as pos- 

 sible touch the posterior margins of the fore-lateral eyes. These last 

 are slightly the largest of the eight. 



44* 



