7-2 DE.SCiUi'TlUN OF GLOSSINA PALPALIS. 



Dark hrown ; ihnrax usually paler, with dark brown marhiiujs on 

 a (jrayisli ground ; abdomen generally with at least an indication of 

 a pale longitudinal median stripe, with pale lateral triangular 

 marJcings, and usually the hind margins of the segments narrowly 

 pale. Legs [except the hind tarsi and last two joints of the front and 

 middle pairs) sumetimes entirely buff -coloured (var. tachinoides, 

 Westw.) ; usually the femora for the most part or entirely darlc broicn, 

 in loell preserved specimens clothed with grayish dust, and the tibise 

 yelUmish. 



Head :^face yellowish, clothed below with gi-ayish dust ; 

 posterior surface of head entirely cinereous ; frontal stripe varying 

 from ochraceous to dark chestnut ; frontal margins grayish, seen 

 from the side with a dark brown elongated area below ; ocellar 

 triangle cinereous, 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. Antennee : 2nd joint more or less yellow at the apex 

 in front, 3rd joint narrowly yellow at the extreme base on the 

 outer side, otherwise entirely dark, with grayish shimmer ; arista 

 yellowish, dark brown on the under side. Palpi cinereous, blackish 

 on upper side. Bulb at base of proboscis dark brown. Tliorax 

 in the most clearly marked specimens bluish-gray or cinereous, 

 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 confluent with the stripes in front ; next to the two 

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

 shai'ply defined oval spob ; 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 Jiearly 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 oflf 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- 



