﻿Bomlyliidac (Dipteori) from Central Africa. ()o7 



22 (11). Wings not so coloured. 



23 (26). Wings mostly black, with hyaline apex; discal cell almost 



all black; no isolated brown spots; some pellucid spots 

 on the cross-veins. 



24 (25). Wings black also at the base and along the whole fore 



border; yellowish spots on the cross- veins very small; 

 third posterior cell shorter than the fourth ; head, abdo- 

 men, antennae and legs black . jacchoides, sp. n., p. 644. 



25 (24). Wings yellow at base and in the middle of the fore border; 



yellow spots on the cross-veins very broad, therefore the 

 wing-pattern showing two black bands fused together on 

 the hind margin; third posterior cell as long as the 

 fourth ; head, abdomen, antennae and legs red 



laeta, Loew, p. 645. 



26 (23). Wings mostly or wholly hyaline ; if the fore border is dark, 



the posterior edge of the marking is not sharply defined ; 

 the discal cell is always hyaline ; there are sometimes 

 isolated brown spots on the cross-veins. 



27 (38). Wings with the fore border narrowly darkened along the 



costa, but not sharply defined ; cross-veins for the most 

 part iiifuscated. 



28 (37). Abdomen of conical shape ; face strongly conical and pro- 



jecting ; some cross- veins infuscated. 



29 (30). Thorax with a distinct w-hite stripe on the sides ; abdomen 



with white scales ; all the cross- vein s margined with 

 fuscous .... punctulata, Macq., p. 645. 



30 (29). Thorax without lateral white stripe on the dorsum ; the 



second cross-vein not margined with fuscous. 



31 (32). Legs and antennae entirely black . major, Kic, p. 646. 



32 (31). Legs and antennae partly red. 



33 (34). Basal joints of the antennae red ; frons almost without black 



hairs ; very large species, without black bands on the 

 abdomen .... batrachoides, sp. n., p. 646. 



34 (33). Basal joints of the antennae black. 



35 (36). Femora entirely red ; hairs of the body grey, without black 



hairs on thorax ; wings hyaline . stannusi, sp. n., p. 647. 



36 (35). Femora with a black stripe ; hairs of thorax of a golden 



colour, mesopleurae with black hairs ; haltères and wings 

 darkened .... capnoptera, sp. n., p. 648. 



37 (28). Abdomen not conical ; face less projecting, almost rounded 



as in Litorrhynchus ; cross-veins not infuscated 



penthoptera, sp. n., p. 648. 



38 (27). Wings entirely hyaline, or only slightly yellowish along the 



costal cell. 



