DESCRIPTION OF GLOSSINA TACHINOIDES. 39 

 Glossina tachinoides, Westw. 



(Plate IV.) 



Glossina tachinoides, Westwood, Proc. Zool. Soc. Lond., Pt. xviii, p. 267, 

 Plate XIX, fig. 2 (1850); Ann. Mag. Nat. Hist., Ser. 2, Vol. X, 

 p. 147 (1852); Austen, Ann. Mag. Nat. Hist., Ser. 7, Vol. XIV, 

 pp. 152-154 (1904) ; British IMedical Journal, September 17, 1904 : 

 Captain R. Markham Carter, I. M.S., British Medical Journal, 

 November 17, 1906, p. 1393. 



Glossina palpalis var. tachinoides, Austen, " A jMonograph of the Tsetse- 

 Flies," p. 74 (1903). 



Glossina Decorsei, Brumpt, Comptes rendus des stances de la Socie't6 de 

 Biologie (Seance du 16 Avril, 1904), T. Ivi, p. 628 (1904). 



^ , 9 • — Length, ^ (9 specimens) 6 to 6'75 mm.,* 9 (9 

 specimens) 6"8 to 8"4 mm. ; width of head, (J 2 to 2-2 mm., 

 9 2-2 to 2-25 mm. ; width of front at vertex, ^ 0-5 mm., 9 

 ■0'75 to 0'8 mm. ; length of wing, ^ Q to 6"5 mm., 9 ^ to 

 7 "8 mm. 



One of the smallest of the known Tsetse-flies. — Dorsum 

 of thorax olive-grey or smo?ce-grey, with dark hrown longitudinal 

 markings of usual type, though often indistinct ; ground colour of 

 abdomen ochraceous-huff or huff, dorsum ivith sharply defined clove- 

 broion or dark brown markings as shown in Plate IV, second segment 

 ■icith a very conspicuous, square or oblong, pale (ochraceous-buff or 

 buff) area in centre ; hind tarsi dark brown, i.e. all the joints more 

 or less dark, extreme tips of first three joints and extreme bases of 

 second and, third joints buff, a larger or smaller area at base of first 

 joint also paler than remainder of joint, especially in 9 • 



Head cream-bufF polHnose, posterior svirface smoke-grey, sides 

 of front (parafrontals) and ocellar triangle light grey, a darker 

 blotch sometimes visible on each parafrontal about midway 

 between ocellar spot and base of antennae ; frontal stripe 

 ochraceous or tawny-ochraceous, ramus on each side of ocellar 

 triangle brownish ; ocellar spot dark brown, connected with usual 

 ■dark brown transverse band joining bases of vertical bristles" ; 

 antennae partly brown or brownish, partly buff, second joint 

 brown or dark brown on inner surface and usually buff on outer 

 side, sometimes brownish on outer side also and buff only at tip, 



* A c5 from the Benue River, Northern Nigeria {Dr. K. Mackay), in 

 the Museum collection, the abdomen of which is distended by coagulated 

 blood, measures 7'25 mm. in length. 



