WERNER MARCHAND 125 



opaque. Palpal sheaths indistinct, not distant; tubercles not dark; ocellar tuber- 

 cles indistinct or wanting; thoracic spiracular tubercles slightly but nearly equally 

 elevated, free margin rounded at tip, rima not vertical, evenly arcuate, slightly 

 hooked in front." 



"Abdominal spiracular tubercles subtriangular, narrower behind, obliquely 

 subconical, much shorter than basal diameter, bearing a small subcircular or short 

 and strongly arcuate rima; on anterior slope a transverse groove, usually longer 

 than the rima; fringes formed of unequal pale spines, only one or two long spines 

 above on seventh segment; outer terminal teeth much longer than the others, 

 directed laterally and upwards, the tips of the four upper teeth about in line. 

 Fringe anterior to anal prominence showing a chitinous webbing between the 

 bases of the spines, so that the separated tufts of the female look like a pair of 

 broad low teeth with several spiny points; lateral tufts low down, near ends of 

 ventral fringe, formed of short spines." 



The pupa is also figured by Malloch (from Hart's material), (Plate 

 12. Fig. 149). 



Oviposition and eggs are not known. Also it remains to be deter- 

 mined whether there are one or two broods of this species in one 

 year. Adults were taken as early as May 17, and as late as September 

 27, with dates of capture in June, July, and August. 



Tahanus maculatissimus Macquart. — ^An African species com- 

 mon in the neighborhood of Mt. Mlanje, southern Nyasaland, where 

 Neave obtained data on the early stages. 



The larvae were found in mud in a partially dried up stream, and 

 from these a few individuals of the adult were bred during Novem- 

 ber. The larvae were obtained in Portuguese territory to the east of 

 Mt. Mlanje. These larvae were not, however, at the time distin- 

 guished from those of Tahanus biguttatus, of which they were thought 

 to be immature examples. The figure (Plate 5, Fig. 71) is from 

 other individuals, obtained subsequently, which are believed by 

 Neave to belong to this species. This figure shows the pigmentation 

 pattern of the eleventh segment considerably developed, while the 

 dark circular band at the posterior end of the segment is compara- 

 tively narrow. 



The pupal aster (Plate 14, Fig. 178, c) is normal except for a pa- 

 pilla on each side of the middle line, about the middle. There is a 

 well marked dorsolateral comb, consisting of comparatively short 

 stout spines. The pupal aster and dorsolateral comb of the female 



