SCENOPINIDAE OF THE WORLD 291 



Length: Male body 5 mm., wing 2.3 mm.; female body 4.5 mm., 

 wing 2.3-2.7 mm. 



Type-locality: Temba, Rgueibat, Sahara; 1 August 1958 (J. 

 Mateu) emerged in the laboratory from a tunnel in the wood of 

 Acacia raddiana Sgn. i)arasitized by wood-boring larvae. 



Holotype: Male (MNHN). 



Allotype: Female, Oued el Arfejd, Sahara Occ; 11 April 1962 

 (J. Mateu) emerged in the laboratory, also from tunnels in wood of 

 Acacia raddiana. 



Paratypes: 1 cf, Mare (=pond) de Biliharo Ennedi (Mourdi), 

 North Chad, 12 January 1959 (J. Mateu); 1 cf', Oued Trick (Osugarta 

 Mountains), 7 April 1961 (J. Mateu) parasite of Anthaxia angusti- 

 pennis (Col. Buprestidae) ; deposited in (MNHN); 1 cf, Beni Abbes, 

 Sahara (Algeria), 14 May 1962 (J. Mateu) retained by me (USNM). 



All of these flies were reared from branches of Acacia which con- 

 tained wood-boring larvae, mainly Buprestidae, Bostrichidae and 

 Cleridae. 



194. Prepseudatrichia stenogaster (Seguy), new combination 



Figure 188 

 Scenopinus stenogaster Seguy, 1931, p. 114. 



This species, originally described in the genus Scenopinus, resembles 

 that genus only in the character of the wing, the head is longer than 

 high, the thorax dorso-ventrally compressed and the round slim 

 abdomen agrees with Pseudatrichia in appearance. It is placed in this 

 new genus on the basis of agreement with females of the other species ; 

 see figure for details. 



Length: Female body 5.5 mm., wing 2.25 mm. 



Type-locality: Nova Choupanga pres Chemba, Zambezi, Mozam- 

 bique; July 1929 (P. Lesne) collected as a larva from the trunk of 

 Sterculia, pupated 6 July, adult emerged mid-July. 



Type: (MNHN). 



195. Prepseudatrichia violacea, new species 



Figure 189 



Female. — Head blackish brown, longer than high; eyes light brown, 

 probably darker in life; i)ostociilar ridge moderately wide, prominent; 

 frons narrow, only as wide as ocellar triangle, rugose, lower along 

 eye margin than center, reflecting pm*ple glints, a flattened area 

 above antennae ending in a point one-third the distance to the 

 median ocellus. Ocellar triangle prominently set off. Mouthparts 

 light brown, palpi tan, well developed filling the oral cavity. Antennae 

 with first two segments dark brown, short; third segment lost. 



