470 Annals of the South African Museum. 



fuscous patch of rectangular shape, extending from the face of the second 

 longitudinal vein to the discal cross-vein and ending there in a straight 

 line; this fuscous patch extends below a little into the upper part of 

 the discoidal cell and into the apical part of the second basal cell and 

 also along the fifth longitudinal vein. 



SOSIOMYA, Bezzi. 

 Ann. S. Afr. Mus., 8, 1921, p. 67. 



ADELIDEA (SOBARUS) AND SOSIOMYIA. 



It seems that the species of this peculiar South African group are 

 more numerous than was at present believed. There can be no doubt 

 that Adelidea fuscipennis, Macquart, is the same insect as Sobarus 

 anomalus, Wiedemann and Loew, and even as Cyllenia longirostris, 

 Wiedemann; all three are one species. I have seen, however, two 

 other species Avhich are certainly different, and therefore I will give 

 the following key for all the known species. 



1 (2). Third antennal joint beset with long bristles above ; antennae entirely 



black ; femora black ; tibiae with partly black spicules ; wings with a 

 rounded fuscous spot at end of the anal cell . comata, Bezzi, 1921. 



ADELIDEA, Macq. 

 Bezzi, loc. cit., p. 3. 



2 (1). Third antennal joint quite bare above; legs entirely reddish with 



quite reddish spicules ; no fuscous spot at end of anal cell. 



3 (4). Basal joints of the antennae red ; wings with the anterior half yellowish 



and with fuscous spots on cross-veins . . ruficornis, n. sp. 



4 (3). Antennae entirely black ; Avings with the anterior half infuscated or 



entirely fuscous. 



5 (6). Wings with the anterior half infuscated and with fuscous spots on 



cross-veins ; discoidal cell much longer than the second posterior cell. 



anomala, Wied.* 



6 (5). Wings equally and intensively infuscated, not spotted; discoidal cell 



only a little longer than the second posterior cell braunsi, n. sp. 



ADELIDEA RUFICORNIS, n. sp. 



Closely allied to A. anomala and possibly the unknown female of 

 this species, but distinguished by the red basal joints of the antennae 

 and by the not infuscated fore half of wings. 



* Of this species I have seen only a rather old male specimen in the British 

 Museum. 



