GLOSSINA PALPALIS: HEAD AND THORAX. 25 



tarsi hlacMsli-brown or clove-brown above ; wings strongly tinged 

 with sepia-brown, but not quite so dark as in the following species 

 (Gr. caliginea, Austen — Plate II). 



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 Js^ertical bristles and very 

 conspicuous except in the darkest specimens ; second joint of 

 antennae 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 the most clearly marked specimens 

 bluish-grey or greyish-olivaceous, with brown markings as shown 

 in Plate I. These markings when fully visible are as follows : a 

 narrow stripe on each side of the median line, 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 con- 

 fluent with the stripes in front ; next to the two admedian 

 stripes on each side on the suture itself a more or less sharply 

 defined oval spot ; on the outside 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 

 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. Pleurae olive-grey or smoke-grey in ^ , 

 drab-grey or olive-grey in 9 5 ^ more or less distinct brown patch 

 in the centre of the mesopleura. Scutellum buff or cream-buff', 

 olive-grey at the base, the usual dark brown patch on each side 

 of the median line more or less conspicuous ; apical scutellai- 



