( C17 ) 



ventral l)risU(', and three or f'onr minute hairs on the hiteral surface in the c?, while 

 iu the ? the lateral hairs are very numerous. The sternites of segments 3 to 7 

 bear on each side two or three bristles iu the <?, in the ¥ there being a few more 

 bristles on segments 5 to 7. Tlie eighth sternite, which is sinuate at the apex 

 in the S , bears on each side of the sinus three stout bristles. 



Legs. — The mid- and hindcoxae are rather long, and bear posteriorly at the 

 apex two bristles. There is no comb on the hindcoxa. The hindfemur bears 

 on eacii side a regular row of nine or ten hairs iu the S, the bristles being more 

 numerous in the ? . All the tibiae are provided with some hairs at the ventral 

 edge. The mid- and hindtibiae have one row of bristles on the outer surface. The 

 dorsal bristles of the tibiae are very long. The long dorsal ai)ioal bristle of the 

 foretibia is very much prolonged ; that of the fifth pair of the hindtibiae is nearly 

 as loug as the tibia, and much longer than the longest dorsal apical bristle, which 

 does not extend to the apex of the first tarsal segment. The tarsi are slender. 

 The second foretarsal segment is a little longer than the foretibia is broad. The 

 hindtarsal segments 1 to 4 bear at least one very long apical bristle, that of the 

 first segment reaching to the base of the fifth. The claw is slender and the basal 

 lobe rather long. The description of the tibiae and tarsi refers only to the S, 

 as these parts are not preserved in onr only ? . The measurements of the tarsi 

 are : — 



Modified Segments. — The clasper of the S (PI. X. fig. 37), which bears at 

 the distal edge a regular series of bristles, is produced ventrally into a slender 

 process bearing loug bristles at the apex (fig. 37, P-). The manubrium (m) is 

 very broad and curved upwards at the end. The finger (f) is narrow and pointed, 

 being somewhat dilated liefore the apex. The ninth sternite (fig. 37, ix. st.) is very 

 peculiar. It is liroad and trnneate at tlie apex, ivith the acuminate ventral corner 

 pointing downwards, and bears three brushes of hairs as shown in the figure. 



For position of hairs on the eighth tergite of the ? see PI. IX. fig. 30. 

 The stylet is cylindrical, being a little more than twice as long as broad. The 

 bristles on the anal sternite are very numerous. 



Length : c?, ~;-l mm. ; ?, 3-3 mm. 



We have four examples of this species collected by Mr. P. 0. Simons : — 



'■i 3(S, Challopata, Bolivia, October 11th, 10(11. Neoctodon simonsi. 



1 ? 



1 (?, Potosi, Bolivia, September 2(ith, 11)01. Ahodoii (dhh-ener. 



12. Pulex COCjrti spec. nov. (PI. IX. fig. 26; X. fig. 31). 



This is a small and very pale species. 



Head. — The head is nearly evenly rounded in the ?, while in the i the dorsal 

 line of the occiput is nearly horizontal. The occiput is two and a half times 

 as long again as the frons in the S. There is a row of three bristles in front 

 of the eye. The occiput bears a regular series of long and short hairs, the most 



