a. Scl. — 



anterior supra-alar. 



a. set. = 



apical scutellar. 



b. set. = 



basal scutellar. 



dc. = 



dorso-central. 



hm. = 



humeral. 



i. or. = 



inferior orbital. 



mpi. = 



mesopleural. 



npl. = 



notopleural. 



oc. = 



ocellar. 



ocp. = 



occipital row. 



or. = 



orbital. 



216 PROF. M. BEZZI. 



may be added as a fourth the somewhat aberrant Schistopterinae. All these 

 four subfamilies are well represented in the Ethiopian fauna, while the first and 

 the last are very scarce or even absolutely wanting in America. 



Owing to the great importance of chaetotaxy for the distinction of these flies, 

 in the following tables and descriptions abbreviations are used for indicating the 

 bristles or macrochaetae, as follows : — 



prsc. = praescutellar. 



prst. = praesutural. 



p. sa. = posterior supra-alar. 



pt. = pteropleural. 



pvt. = postvertical. 



sa. = supra-alar. 



scp. = scapular. 



set. = scutellar. 



st. = sternopleural. 



s. or. = superior orbital. 



vt. — vertical. 



The Ethiopian genera of Trypaneidae may be distinguished as follows : — 



1(6). Thoracic chaetotaxy incomplete, hm., prst., dc. and st. being always 

 wanting (and also the prsc. in African forms). . . . . Subfam. Dacinae. 



2(5). Femora not spinose beneath ; thoracic suture interrupted ; inferior angle 

 of the anal cell drawn out into a very long, thin point. 



3(4). Only two sa. present, the anterior one being entirely wanting 



Dams, F. (s. str.). 



4(3). Three sa., the anterior one being well developed. . . . Tridacus, Bezzi. 



5(2). Femora spinose beneath ; thoracic suture complete ; point of anal cell 

 proportionally short . . . . „ . . . . Meracanthomyia, Hend. 



6(1). Thoracic chaetotaxy complete ; that is, the above-named bristles usually 

 present, or at least not all wanting at the same time. 



7(92). Wings with the costa not broadly interrupted at end of the auxiliary vein, 

 and destitute of peculiarly coloured " bullae " on the disc. 

 J 8(67). Ocp. composed of thin and acute bristles, which usually are of a black colour ; 

 in doubtful cases, either the antennal arista is plumose, or the scp. are 

 well developed, or the dc. are placed much behind the suture, or the 

 third longitudinal vein is bristly, or the point of the anal cell is long, or 

 the wings are not reticulate, or the body shows a striking coloration 



Subfam. Ceratitinae. 



9(10). Femora spinose beneath ; arista shortly plumose ; third longitudinal vein 

 with only a few bristles near its extreme base . . Conradtina, End., p. 222. 

 10(9). Femora not spinose beneath. 



