﻿Bombyliidae {Diptera) from Central Africa. 621 



9 (10). Base of the second vein witliout recurrent veinlet . spec, indet. 



10 (9). Second vein with the usual recurrent veinlet at the base. 



11 (12). Upper branch of the cubital fork with the portion after the 



bend very sinuous ; no hyaline spot before tlie small 

 cross-vein ..... camptodadius, sp. n. 



12 (11). The upper branch after the bend is straight ; a hyaline 



spot in the first basal cell just before the small cross- 

 vein ....... pasillus, Wied. 



24. Anthrax pithccius, Fabricius (1805). 



This is a common and widespread African species, with 

 which conspurcatus, Wied. (1828), confusemacukdus, Macq. 

 (1855), and spectahilis, Loew (1860), are without any 

 doubt synonymous. The single discrepancy in Wiedemann's 

 description of eonsimrcatus is the yellowish legs : but this 

 is a very variable character, which is affected by the 

 relative maturity and state of preservation of the speci- 

 mens. Plumula with black and white fringe. This species 

 can perhaps be better placed in the genus Molyhdamocha, 

 with the somewhat similar American tigrina, de G. 

 (simson, Fabr.). 



Several specimens from North Nyasa,Akamang'a, October 

 8, 1909 ; Karonga, September 14, 1909 ; Remero stream, 

 November 24, 1909, and Bundi village, Fuliwa, May 13, 

 1909 (all from Dr. J. B. Davey). Also a specimen from 

 Southern Nigeria, Oni, seventy miles east of Lagos, May 

 14, 1910 {W. A. Laniborn). 



The size varies from 8 to 14 mm. 



25. Anthrax diffusus, Wiedemann (1824). 



A. maculipennis, Macq. (1840), is without doubt the 

 same species. A. h6Ssii,Wïeé. (1818), has the dark mark- 

 ing at the base of the wings less widened. Plumula with 

 a black fringe ; anal cell open ; there is often a rounded 

 brown isolated spot on the lower vein of the discal cell. 



A single specimen from West Nyasa, Limpachi River, 

 November 1909 (Br. II. S. Stanmis). But I have the 

 species in my collection, through the kindness of Dr. 

 Brauns, from Willowmore, Cape Colony. 



26. Anthrax aygulus, Fabricius (1805). 



An interesting species of large size, which had not 

 hitherto been recognised as an Argyramocba in the 

 published catalogues. 



The clear portion of the wings is truly hyaline, while in 

 the preceding species it is smoky ; the two black spots are 



