South African Chironomidae (Diptera). 267 



-than thick, 6 two and a half times as long as 5, with a moderately 

 long terminal seta. Wings hyaline, transversal pale, bifurcation of the 

 postical distal from the transversal, basal lobe ending in an acute 

 angle. Fore tarsus of male not hairy, very slender, the metatarsus 

 longer by one-fourth than the tibia, nearly double the length of the 

 2nd joint, 4th double the length of the 5th, pulvilli moderately wide, 

 reaching only to the median part of the hooks, empodium hardly 

 reaching the hooks. Terminal joint of the forceps not arcuate, in 

 the shape of an elongated ellipse, hairy all over, upper appendage 

 glabrous, thin, arcuate, sharp, sublinear, rounded at tip, reaching 

 almost to the middle of the terminal joint, pilose as usual, lamina 

 ending in a gradually thinned point. 



Length : $ , 5-6 mm. Cape Town, September, 1913. (L. 

 Peringuey). 



CHIBONOMUS (TENDIPES) SENSUALIS, n. sp. 



$ ? . Scape of the male reddish, flagellum pale, scape and 

 nagellum of female reddish brown, thorax dark yellow or brown, 

 mesonotum white, 3 shortened, fulvous bands opaque not pruinose ; 

 scutellum whitish, with long hairs ; legs yellowish, end of joints 1-4 

 in the fore tarsus, and the whole of 5 iiifuscate ; abdomen yellow, 

 tergites 2-5 of the male with a transverse spot gradually narrowing 

 laterally and occupying the anterior half, 6-8 brownish like the 

 forceps ; in the female the tergites 2-4 or 2-5 have the half of the 

 anterior part brown. Frontal lobes very small. Antennae of male 

 12-jointed, the last joint 2i times as long as the 10 preceding taken 

 together, fusiform at tip, joints 3-11 a little transverse, plume 

 fulvous. Antennae in the female 6-jointed, the ultimate joint 

 longer by one-half than the penultimate, gradually thinned and 

 remarkable for the long sensorial appendages, the latter thick and 

 4 or 5 times as long as the greatest thickness of the joint, joints 3-5 

 remarkable for their long neck which is slender and longer than the 

 ellipsoidal nodosity, the 2nd joint is narrowed in the centre and the 

 neck is twice as long as wide. Wings hyaline, transversal, brown, 

 cubitus arcuate reaching almost the alar apex, bifurcation of the 

 postical a little distal from the transversal. Anterior tarsus of male 

 not hairy, very slender, the metatarsus at least half as long again 

 as the tibia, 4th joint hardly longer than the 3rd ; in the female the 

 fore metatarsus is longer by one-half than the tibia, 4th joint dis- 

 tinctly longer than the third, more than twice as long as the 5th, 

 pulvilli large, reaching the centre of the hooks. Terminal joints of 

 the forceps arcuate, distal half glabrous and gradually thinned into 



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