Species of the Genus of Alipes. 93 



same species have since been acquired from Sierra Leone and 

 the Cameroons {vide Porat, Bih. Sv. Vet.-Akad. Handl. xx. 

 pt. ii. no. 5, p. 15, 1895). The British Museum has examples 

 from Cape Palmas {Ahan Millson) and the Cameroons 

 [Johnston) which, without much doubt, are also to be referred 

 to this species. 



The specimens from the Cameroons are in a good state of 

 preservation. The largest measures 120 millim. in length and 

 7*5 in width, the anal leg being 36 long, or as long as the 

 last six segments and part of the seventh ; the head and first 

 three segments are a deep blackish green, while the rest are 

 reddish brown with a green stripe along the hinder border, 

 and the legs are a bright ochre-yellow, except the anterior 

 three pairs, which are tinted with green. The second speci- 

 men, measuring 78 millim. long and 4*8 wide, with the anal 

 leg 28, resembles the large one in a general way as regards 

 colour, except that the anterior half of the body is greener 

 and there is no transverse stripe on the posterior border of 

 the posterior tergites. Again, the crests and spicules on the 

 tergites are stronger than in the large individual, a fact 

 which seems to show that these structures wear down with age. 

 So, too, the grooves and spicules on the legs become less 

 pronounced with increase of size. The two specimens from 

 Cape Palmas are of smaller size (62 millim.) and are of a 

 uniform deep green colour. In these, again, the sculpturing 

 is coarse, but unfortunately they have no anal leg. 



This species may be distinguished by the form of the anal 

 legs; the expansions of the tibife are of very large size, both 

 rise from the anterior end of the segment, and though the 

 lower has a more convex margin, it is not larger at its distal 

 end ; the distance between these points is nearly equal to the 

 length of the segment along the middle line; the height of 

 the protarsus is about five sixths of its median length, or, in 

 the small specimen, rather less, while the height of the tarsus 

 is about four fifths of its length (fig. a, p. 96). 



Ahpes crotalus (Gerst.), 

 Eitcoryhas crotalus, Gerstaecker, o;;. cit. p. 309, pi. ii. fig. 1. 



Recorded originally from Natal, whence the British 

 Museum has received three examples collected by Gueinzius, 

 one by Mr. Plant, and one by Colonel Bowker. All 

 these examples agree closely with Gerstaecker's figure and 

 description, and are no doubt co-specific with his specimen. 

 Fortunately all of them are provided with the anal legs, so 

 that it becomes possible to test the constancy of the features 



