256 GLOSSINA PALPALIS [CH. 



Glossina palpalis Rob. Desv. 1830. 



Synonyms. Nemorhina palpalis Rob. Desv. 1830. Glossina longipalpis 

 Walker (nee Wiedemann), 1873. G. ventricosa Bigot, 1885. G. tahaniformis 

 Bigot, 1885. G. maculata Newstead, 1907. G. fuscipes Newstead, 1910. 



Description^. " Length, J 8 to 9 mm., S 8-6 to io-2 mm., width of head 

 <f 2-4 to 2-6 mm., ? 2-5 to just under 3 mm.; width of front of vertex, J 

 0-6 mm., J I mm ; length of wing, ¥ 7 to 8-4 mm., J 8-4 to 9-2 mm. 



" Abdomen clove-brown or blackish-brown ; thorax usuallj' paler, with 

 dark brown markings on a greyish ground ; abdomen generally with at least 

 an indication of a pale or slate-grey longitudinal median stripe, with pale 

 lateral triangular markings, and usually the hind margins of the segments 

 narrowly pale. Femora in typical race more or less mouse-grey, greyish-brown, 

 or dark slate coloured ; tibije, extreme tips of femora, and first three joints of 

 front and middle tarsi buff or ochraceous-buff, hind (or middle and hind) 

 tibiae sometimes infuscated in <? ; hind tarsi blackish-brown or clove-brown 

 above ; wings strongly tinged with sepia-brown, but not quite so dark as in 

 G. caliginea. 



" Head. — Face and jowls cream-coloured or cream-buff ; posterior surface 

 of head (occiput) entirely cinereous ; frontal stripe varying from ochraceous 

 to dark chestnut ; frontal margins (sides of front or parafrontals) greyish, 

 seen from the side with a dark brown elongate area below ; ocellar triangle 

 smoke-grey, enclosing the dark brown ocellar spot, which is joined posteriorly 

 to a sharply defined dark brown band, uniting the vertical bristles and very 

 conspicuous except in the darkest specimens ; second joint of antennw more 

 or less yellow at the apex in front, third joint narrowly buff at extreme base 

 on outer side, otherwise entirely mouse-grey ; arista buff, dark brown beneath ; 

 palpi mouse-grey, blackish on upper side, proboscis bulb dark brown. 



Thorax. — Dorsum in most clearly marked specimens bluish-grey or greyish 

 olivaceous, with brown markings. These markings when fully visible are as 

 follows : a narrow stripe on each side of the median hue, interrupted before 

 reaching the transverse suture and again before reaching the hind margin ; 

 the section of each stripe behind the suture is expanded posteriorly, and the 

 terminal portion of the stripes immediately in front of the hind margin takes 

 the shape of a pair of more or less confluent ill-defined spots, sometimes 

 confluent with the stripes in front ; next to the two admedian stripes on each 

 side of the suture itself a more or less sharply defined oval spot ; on the out- 

 side of this a longitudinal stripe, more or less interrupted and sometimes 

 obsolete in the middle, but in front curving round outwards behind the 

 humeral callus and then running backwards along the lateral margin of the 

 dorsum nearly to the post-alar callus ; in the area thus enclosed is a broad ill- 

 defined patch in front of and behind the suture while the lateral stripe itself 

 sends off two prolongations, which run inwards for a certain distance on each 

 side of the suture. Humeral callus with a spot on its upper portion, confluent 

 with the curved stripe behind it ; a more or less ill-defined spot on the post- 

 alar callus also. Pleurs; olive-grey or smoke-grey in male, drab-grey or olive- 

 grey in female, a more or less distinct brown patch in the centre of the meso- 

 pleura. Scutellum buff or cream-buff, olive-grey at the base, the usual dark 



' Taken from Austen, Handbook of the Tsetse-Flies, 1911, p. 24. 



