Species of the Genus Alipes. 97 



Legs finely spicular above and laterally, like the terga, but 

 less thickly, the posterior more so than the anterior ; the 

 upperside of the patella and tibia longitudinally grooved ; a 

 tarsal spur on the anterior eight (or fewer) pairs, also an 

 anterior tarsal spur, on the anterior four pairs an anterior 

 tibial spur, and on the first pair an anterior patellar spur. 



Length (?) 95 millim., width 6-5, length of anal leg 30, 

 height of protarsus 4-5; length {,$) 85, width 5*5, length of 

 anal leg 28"5, height of protarsus 4. 



Loc. Zoraba, 3000-9000 feet (types), Milangi, both in 

 Nyasaland {Sir H. H. Johnston). 



Three examples were obtained at Zomba and one at 

 Milangi ; the smallest of those from Zomba, measuring 

 71 millim. in length, has lost its anal legs, but it is noticeable 

 that the sculpturing of the terga is coarser, the spicules 

 appearing on the first tergite, whereas in the largest specimen 

 they do not set in until the third ; there is, moreover, a 

 distinct median crest on the last tergite, of which the largest 

 specimen shows no trace. The Milangi example has also lost 

 these appendages, but it agrees with the type in other respects ; 

 its length is 83 millim. 



This species seems to differ from all the previously described 

 forms in the fact that its anal legs are furnished either with 

 a long process or with a spiniform tubercle in its place ; none 

 of the other specimens of the genus in the British Museum 

 show a trace of these structures, and no mention of such 

 appears to have been made in literature. Apart from this, 

 tiie anal legs seem to closely resemble those o'i A. Grandidieri^ 

 the type of which, judging by the length, 56 millim. (possibly 

 includmg the anal legs), was not full-grown. It is necessary, 

 therefore, to bear in mind the possibility of A. appendiculatus 

 proving to be the adult of A. Grandidieri — a conclusion 

 rendered to my mind still more probable by tiie fact that a 

 specimen of this genus in the British Museum from Mombasa, 

 whicli on geographical grounds might be expected to be tlie 

 same as Grandidieri^ does not present any features by which 

 it may be separated from appendiculatus \ but, unfortunately, 

 its anal legs are gone, so that the organs that otfer the best 

 specific features cannot be compared. The length of this 

 specimen is 68 millim., and its head is as long as wide, so 

 that in these respects it comes between Grandidieri and 

 appendiculatus. 



In the absence of an armature of spines from the lower 

 surface of the anal femora, as well as in the bluntly ended 

 unarmed anal pleuree, the genus ^?<))e5 resembles the genus 

 Parotostigmus^ Foe. (Biol. Centr.-Amer., Chilopoda, p. 25, 



Ann. ct Mag. N. Hist. JSer. 6. Vol: xviii. 7 



