( 641 ) 



than the' upper oues, the uppermost hair being stouter aud more spine-like than 

 the others. The ninth sternite is boomerang-shaped, the ventral portion being 

 mesially divided as in T. poppei ; each half of this ventral part bears at the apex 

 three curved spine-like bristles (PI. XIII. fig. 68). The tenth segment is very 

 long and narrow (PI. XIV. fig. 71, x.t. and x.st.). 



The eighth tergite of the ? bears a number of hairs above the stigma 

 (PI. XIV. fig. 74). The hairs on the lateral surface and at the apex are disposed 

 as shown in the figure. The stylet of the anal segment is about three times as 

 long as broad. 



Length : (?, 3-4 mm. ; ? , 4-4 mm. 



We have twelve specimens of this species, collected by Mr. W. F. H. Rosenberg, 

 as follows : — 



1 c?, Cayembe, Ecuador, 12. June, 1807, from MeAachirus opossum. 



2 2 2 



1 (?, „ „ 21. „ „ „ Didelphys azarae. 



2 2 2, Tharra „ 31. May „ „ „ „ 



30. Ctenophthalmus pseudagyrtes (PL XIV. fig. 73. 78 ; XV. fig. 81). 



Ct. ps. Baker, Proc. U.S. Nat. Mw. xxvii. p. 421. t. xi. f. 7-12 (1904). 



Head. — The head is practically the same as that of Ct. bisoctodentata (Kol.), 

 there being three genal spines. 



Thorax.— The prothorax bears a comb of eighteen teeth and one row of bristles. 

 The mesonotum bears in front another row of shorter ones, and between this and 

 the base a great number of more or less irregularly placed short bristles. Near the 

 apical margin of the mesonotum there are on each side three long hair-like spines, 

 two being dorsal and one halfway down the side. The metanotam bears two rows 

 of bristles, besides one or two additional ones. The epimerum of the metathorax 

 bears six bristles, one standing just beneath the stigma, three being more proximal 

 and standing in a triangle, the fifth being placed near the ventral edge, and the 

 sixth being somewhat distal of the stigma and about on a level with the lowest 

 anterior bristle. 



Abdomen. — The abdominal tergites bear two rows of bristles each, one bristle of 

 the posterior row standing beneath the stigma. The first tergite bears in addition a 

 number of hairs on the back. The first four tergites bear each a short spine at 

 the apex. There are three apical bristles on the seventh tergite in both sexes. 

 The upper one is about as long as the third bristle of the posterior series of this 

 segment, the middle one is about twice (?) or nearly three times (t?) as long as the 

 upper one, while the ventral one is about half as long again as the upper one. The 

 sternite of the first abdominal segment of the S bears one bristle on each side ; 

 the following four sternites bear a series of four bristles with a nnmber of shorter 

 ones in front ; on the sternite of the seventh segment there are a few more hairs. 

 In the 2 the sternites of segments 3 to 7 bear one to three hairs more than in 

 the cJ. 



Legs. — The mid- and hindcoxae bear on the innerside just above the trochanter 

 one long and one very short hair, and are dilated beneath into a rounded flap, as is 

 the case in Ct. agijrtes and Ct. bisoctodentata. The femora are devoid of liairs on 

 the lateral surfaces, except one minnte hair on the innerside of the midfemur. 

 The mid- and hiudfemora bear two subventral hairs near the apex, followed by 



