126 " THE EARLY STAGES OF TABANID^ 



and the dorsolateral comb of two different male individuals are fig- 

 ured (Plate 14, Fig. 178, a~d). 



Tahanus medionotatus Austen. — An African species, to which Neave 

 attributes, with some doubt, a series of specimens collected in southern 

 Nyasaland in 1915. Of this species five males and three females 

 were bred between the end of September and the beginning of 

 November. 



The pale colored larva has rather long prolegs, a ring of pigment of 

 varying width around the base of the syphon (Plate 5, Fig. 68), and 

 another ring around the anus, which is usually prominent in the 

 living larvae. There are also present two prolegs immediately ante- 

 rior to the anus, but these are not visible in the somewhat contracted 

 preserved specimen and therefore are not shown in the figure. The 

 pupal aster (Plate 14, Fig. 174, a, h) resembles that of Tahanus 

 ohscuripes in having a large and even longer, but less horizontal, 

 middle pair of hooks. Not only the dorsolateral but also most of 

 the lateral comb is absent. 



Tahanus melanoceros Wiedemann. — A species recorded from the 

 Atlantic States from New Jersey south. 



Late in March, 1909, Brimley in Raleigh, North Carolina, found, 

 v/hile looking under stones in a small clear woodland stream, a 

 Tahanus larva which was quite lively and seemed thoroughly at home 

 in clear water. He kept the specimen in a bottle with some wet leaves 

 and practically forgot it. However, on May 18 it had transformed 

 to a pupa, and thirteen days later, on May 31, a male of Tahanus 

 melanoceros emerged from the pupa. The larva was approximately 

 the same size as the trimaculatus larvae collected by Brimley, and was 

 like them white without darker bands. 



Tahanus nagamiensis Carter. — ^An African species, only recently 

 described, of which a single female was captured by Neave on the 

 Malosa River, the Anglo-Portuguese boundary south of Mt. Mlanje, 

 southern Nyasaland, on October 8, 1913. A male was bred from a col- 

 lected pupa on September 27, 1913. 



The pupal aster (Plate 15, Fig. 179, a, h) somewhat resembles that 

 of Tahanus laverani in the great development of the middle pair of 



