402 ENTOMOLOGICAL NEWS [Nov., 'lO 



"i. Palaeogaeic forms; posterior legs comparatively short and 

 stout, about half the length of the bug; the claws unequal, 

 and nearly simple, the other large and bent, its basal tuber- 

 cle nearly as long as the simple claw 2. 



"la. Neogaeic forms; posterior legs as long as the bug; claws 

 nearly equal, with a small tooth at the base, 



i, Hesperoctenes, mihi 



"2. Antennae long, the third segment almost (or more than) as 

 long as the fourth _ - 3. 



"23. Antennae shorter, third and fourth segments about equally 

 long 4, Eoctenes, mihi. 



"3. Head medianly wider than long. Pronotum transverse, 



3, Polyctenes, Gigl. 



"33. Head medianly longer than wide. Pronotum elongate, 



2, Euroctenes, mihi.'' 



The new species which we describe here is based on 

 three specimens, two males and one female, received from 

 the Entomological Research Committee of the British Mu- 

 seum in Tropical Africa. These specimens were taken from 

 an unidentified bat from Khartoum in the Egyptian Sudan. 



Eoctenes eknomius sp. nov. 



Differs from the type species of the genus, E. spasmac, in having the 

 the metathorax cleft for half its length and a row of cultriform spines 

 on the posterior margin of both the pro and mesothoracic segments, a? 

 well as a similar row on the head. It shows also various less con- 

 spicuous differences. 



Length of body, 2.3 mm. ; width at widest part, .8 mm. 



Head : Length, .46 mm. ; width, .44 mm. ; widest at posterior angles, 

 which are acute, and narrowing to the base of the antennae, then 

 widening suddenly to form the rounded clypeus. Suture separating 

 clypeus from the posterior portion of the head very distinct. The 

 lateral margins of the clypeus are flattened and here occur four round- 

 ed chitinous thickenings on each side, from each of which arises a fine 

 hair, the anterior one short, second long, third short, and fourth long. 

 The posterior margin is incised angularly leaving a central clear space, 

 bordered laterally by two fan-shaped chitinous thickenings which ex- 

 tend forward into the clypeus. A row of sharp spines extends inward 

 from the posterior lateral angles to the inner angles of the posterior 

 margin. On the ventral side of the head a chitinous band extends from 

 each posterior angle of the head forward along the margin, curving 



