South African Cliironomidae (Diptera). 265 



glabrous, a little short of the distal middle, the apex bears on the 

 median side 8 or 9 seriate setae, and is as long as thick, upper 

 appendage very thin, almost straight, incurvate and pointed at apex, 

 glabrous and projecting beyond the basal joint, lower appendage 

 wide, rounded at apex, projecting beyond the middle of the 

 terminal joint, pubescent, its distal 3rd with the usual long bent 

 hairs, lamina with a long beak incurvate at tip. 



In one of the males the colour of the mesonotum and of the 

 scutellum turned from yellow to greenish, and the black bands of 

 the tergites extended over two-thirds or three-fourths of the anterior 

 part of the tergites. 



Length : $ , 8-9 mm. ; 5 , cS mm. Cape Town (L. Peringuey) ; 

 Smithfield, O.F.S. (D. E. Kannemeyer). 



CHIUOXOMUS (TKNDIIMOS) CAFFRAKIUS, n. sp. 



cf ? . Greenish yellow or only yellowish, scape of male brownish 

 black, Huge limn brown ; scape of female yellow, flagellum brownish 

 black ; mesonotum opaque, pruinose, with 3 shortened bands, meta- 

 notuni and mesosternum pruinose brownish black, tergites of male 

 brown on half or two-thirds of the anterior parts, the following por- 

 tions nearly entirely brown ; in the female all the upper part of 

 abdomen is brownish ; distal half of the metatarsus and the 4 joints 

 following brownish black in all the tarsi. Palpi long, brownish 

 black. Frontal lobes small. Antennae of male 12-joiuted, the last 

 one 3i times as long as the 10 preceding taken together, 3-11 

 3 times as thick as long. Antennae of the female 6-jointed, the 

 2nd narrowed in the centre, 3-5 fusiform, G hardly double the size 

 of 5. Wings hyaline, transversal black, bifurcation of the postical 

 situated under the transversal. Anterior metatarsus of the male 

 almost two-thirds longer than the tibia, the distal two-thirds, and 

 the 3 following joints set with long hairs, joint 2 hardly longer than 

 the half of 1, 2-4 gradually shortened, 4 nearly double the length of 

 5, pulvilli broad. Terminal joint of the forceps arcuate, glabrous 

 and gradually thinned for a little more than the distal 3rd, median 

 side of the apex with 6 seriate long setae, longer than the thickness 

 of this part of the joint, upper appendix barely projecting beyond 

 the basal joint, glabrous, wider at the middle, nearly straight, apical 

 part thin and incurved, inferior appendage broad, rounded at end, 

 reaching the middle of the terminal joint, pilose as usual, lamina 

 with an obtuse beak. 



Length : 7-8 mm. Cape Town. (L. Peringuey.) 



