— 30 — 



tip of the wing, in its smaller size and darker colour. May be 

 this is the male of the preceding species? 



The eyestalks are dark-brown. The front, occiput and 

 distal ends of the ejestalks are blackish. The eyes are dark- 

 brown. At the distal margin of the eyestalk there is dorsally 

 a seta bent laterally. The thorax, neck and scutellum are 

 black with grayish tint. The seta at the end of the spines 

 is thin and tender, almost as long as the spines. 



The wings are translucent with a weak brownish obscu- 

 rity in the middle. 



The abdomen widens towards the back, black, shining. 



Anteriorly to the groove of the first segment there is on 

 either side a light blue spot rounded behind. 



Behind the groove, near the lateral margins of the abdo- 

 men there is a pair of red-brown weakly outlined spots. 



The lower, ventral side of the abdomen possesses a wide, 

 brown, coffee-coloured median longitudinal band, which is 

 interrupted at the border-line of the segments by the gray 

 ground-colour of the ventral side. The black colour of the 

 dorsal side passes also to the ventral side of the abdomen in 

 the form of triangles with an acute interior angle, of which 

 the anterior triangle reaches the median band with its interior 

 angle, whilst the others do not approach it near. 



Two d'd from Mabira, 12. VI. 



Diasemopsis pulchella n. sp. 



Fig. 5, $. 



Length 5-5V'2 mm. Width of head with eyestalks about 

 3^/2 mm. 



.This is a graceful species with strongly developed setae 

 sitting partly on stalks and with a dense cover of hairs. 

 Sexual dimorphism is present. 



The head and eyestalks are yellow-brown. The arcuate 

 line is weakly outlined, but is continued as a clear, black 

 line along the eyestalks. Under the eyestalks there is a dusky- 

 brown smear. The short eyestalks are thin, their seta is 

 strong and long, sits vertically on a short brown stalk and 

 is slightly bent backwards. 



Thorax black, shining. The pleurae in the female gradually 

 pass into a brownish colour. The short, rather elevated scutel- 



