— 23 - 



The head narrows regularly towards the mouth, of yellow- 

 brown colour. The face is ligliter than the occiput. On the 

 front above the linea arcuata is a large, sharply outlined black 

 spot; below it is another spot of smaller size. From both sides 

 of the mouth there is one frail spine. The proboscis is grayish- 

 yellow, the palps— light yellow. The eye-stalks are longer 

 than the head and thorax taken together, and are sharply 

 distinguishable from the head owing to different coloration. 

 They are light or dark-brown; nearer to the distal extremity 

 than to the head a small seta is attached. The antennae are 

 yellowish-brown with a black seta. The eyes are dark-brown. 

 The thorax is black with a weak duUgray tint. The long 

 neck and scutellum are black. The lateral spines are short, 

 of yellow colour. The scutellar spines are long, sharp, and 

 mucli less divergent than in all the other species of the group 

 apicalis Dalm. The halteres are white. The coxae are light- 

 yellow. The fore femora are swollen, brown-yellow; the remai- 

 ning femora are slightly lighter. Both hind pairs of femora 

 are provided with slightly developed distal spines. The fore 

 tibiae are brown, the middle brown-yellow, the hind— also 

 brown-yellow,. but on the sides near the base and at the dis- 

 tal end — with dark-brown, elongate spots; so that when they 

 are seen from the side, they seem dark-brown with a wide 

 light band in the middle. The fore tarsi are darker brown 

 than the rest. The wings are translucent with a slight brown 

 tinge in the middle, on either side of the upper transverse 

 vein, and with a spot of the same colour on the end of the 

 3-rd longitudinal vein (R4-[-5). The abdomen widens posteriorly 

 (abdomen clavatum), ventrally slightly concave. The first, 

 longer segment, is black up to the transverse groove which 

 represents the remnant of the border between two segments 

 that have grown together. The remaining part of it is red- 

 brown. On the sides, on the level of the groove this segment 

 is lighter (see fig. 1). The lower, ventral side is brown, darker 

 at both extremities. Some parts of the body are covered with 

 white tender hairs, namely: the dorsal part of the abdomen, 

 especially at the base, and the face. The femora, except the 

 fore pair, have a slight hairy covering. The tibiae and tarsi 

 are covered with tender setae. 



The characters that distinguish the species from apicalis 

 Dalm. are the slightly diverging scutellar spines, the black 



