146 V. L. KELLOGG AND J H. PAINE — ANOPLURA AND 



entirely across tlie abdomen ; this is the suture between segments 5 and 6. Last 

 segment angularly cmarginate behind, forming two tooth-like pieces ; when these 

 pieces are brought together their tips meet behind a small open space. All 

 segments with distinct brownish black lateral blotches just inward from the 

 spiracles, each of which is set in a small brown circular sjDot ; on the middle of 

 the segments are pairs of short lateral brown bars, thicker and shorter on the 

 posterior segments (PI. IV, fig. 3). 



Male. — Length, 4 mm. ; width, 2-24 mm. Posterior segment not emarginate 

 (or toothed) but entire and with a conspicuous tuft of several short hairs in each 

 postero-lateral angle (PI. IV, fig. 6). 



Linognathus vituli (Linn.) Dalla Torre. 



Specimens from calf, Songwe Rivei-, N. Nyasa {Dr. J. B. Darey). 



Linognathus africanus, sp. n. (Pi. IV, figs. I, .3). 



Males and females from sheep, Abeokuta, Southern Nigeria, W. Africa 

 {J. J. Simpson). 



This new Linognathus is rather near L. vituli, the common long-nosed louse of 

 the ox, but has a shorter and broader head, a larger, broader body and the 

 antenna? with the basal two segments curiously large. 



Female. — Length, 2"5 mm. ; width, 1 mm. ; the body of the female is thus 

 only about 2i times as long as the width of the abdomen, and the head is hardly 

 twice as long as broad. Head with the antennte inserted in front of the middle, 

 the two basal segments being conspicuously larger than the following segments. 

 Thorax at its anterior end only slightly wider than widest part of head, but 

 gradually widening posteriorly. The lateral margins are straight, slightly 

 diverging lines, showing some brown coloration and chitinous thickening, with 

 short tapering brown chitinized lines projecting diagonally towards the middle of 

 the segments. Pro-, meso-, and meta-segments all so fused as to be hardly 

 distinguishable. One pair of longish, strong, almost spine-like hairs on dorsal 

 surface of the meso-segment, the whole thorax otherwise without hairs. Abdomen 

 broader in relation to its length than in L. vituli, and with entire, flatly convex 

 margins. The segments are so fused that they are distinguishable only by the 

 position of the spiracles and transverse dorsal rows of short hairs, there being- 

 five of these rows, one of which is shorter than the others, on each segment 

 (PI. IV, fig. 1). There are two or three hairs in the postero-lateral angle of each 

 segment, one, then two, of these hairs getting progressively longer from the 

 anterior to the posterior end of the abdomen. Last segment of female with 

 entire posterior margin and few hairs. 



Male. — Length, 1'54 mm. ; width, "54 mm. Last segment of abdomen with 

 a small rounded projection at middle of posterior margin, and with numerous 

 short spiny hairs on each side of this swelling ; one specially strong, spine-like, 

 but short hair on each lateral margin of the swelling. Ground colour of whole 

 abdomen pale translucent yellowish brown ; the male genitalia usually showing- 

 through, dark brown in colour (PI. IV, fig. 5). 



