CHALCIDOIDEA BRED FROM GLOSSINA. 



73 



scales and short thick bristles. Besides these elements the chaetotaxy comprises 

 also fine bristles (long and short) of two colours : — (a) blackish brown, clothing 

 the apex broadly and more scattered on the under surface, and (6) qaite hyaline 

 and refringent, covering the clear spot below the radius, and giving the spot a 

 silvery white appearance in direct light. Length of forewing, 2*4 mm. ; breadth, 

 0*8 mm. The hind wing is about four-fifths as long as the forewing ; length : 

 breadth, 9:2. 



Legs : the fore femur is considerably swollen and broadest before the apex ; 

 in the mid leg (fig. 2, 3) the swelling of the femur takes place abruptly after one- 

 haK ; on the lower outer edge of the hind femur, which is minutely denticulate 

 from the apex to about one-third from the base, there are on the posterior half two 

 distinct, nearly equal prominences, and a third, less clearly marked, just before one 

 half (fig. 2, 4, 5). 



Proportions of Tarsal Joints. 





i. 



ii. 



... 

 ill. 



iv. 



V. 



Claw. 



Fore 



95 



55 



45 



40 



55 



25 



Mid 



130 



65 



50 



40 



55 



30 



Hind . . 



80 



75 



60 



50 



80 



45 



Abdomen ovate and acutely pointed ; the first segment is the widest and about 

 as long as wide ; it occupies rather less than half, the posterior edge lying mid-way 

 between the insertion of the petiole and a line connecting the stylets on tergite 7. 

 The entire surface is polished and shining, there being only a slight patch of 

 pubescence on each of the pleurae. Second segment about as long as the fifth, and 

 both longer than the third, while the fourth appears so much wedged in dorsally 

 as to be reduced to a mere line in the middle ; segments 6 and 7 are again long, the 

 former slightly shorter ; segment 7 is as long as segments 2 to 5 inclusive. The 

 upper sheath of the ovipositor (tergite 8) is half as long as the seventh segment ; the 

 ovipositor does not project. After the first segment the tergites are finely raised 

 reticulate, the pattern on tergite 6 being coarsest on the distal three-fourths ; the 

 basal one-fourth is on this tergite smooth. On the seventh tergite the stylets are 

 placed just before one-half ; their containing depressions meet indistinctly above, 

 and from this junction a keel stretches backwards to the posterior edge. The pleurae 

 of all the tergites (except 1 and that partially) are covered with pubescence, the 

 units of which are stronger and refringent on segments 2, 3 and 6 ; elsewhere the 

 clothing is of fine hairs which are best seen in side view ; the refringent patches 

 have a characteristic silvery gleam (see colour notes). 



Length, about 4 mm. ; alar expanse, 6 mm. 



Northern Khodesia : Mwengwa, 3,200 ft., one specimen bred from a pupa of 

 Glossina ynorsitans {R. A. F. Eminson). 



Type— a. $. 



Mr. Eminson found the puparium from which the Stomatoceras was bred on 

 6th October, 1914, in the locality where the puparia yielding Syntomosphjrum occurred 



