WERNER MARCHAND 55 



in the female. The pupal asters of both sexes are shown (Plate 13, 

 Fig, 168, a, h)}^ 



Dorcalcemus fodiens Austen. — -An African species, on which some 

 observations have been made by Neave (1915) in southern Nyasaland. 



Some examples of what may be the larvae of this species were found, 

 though the point could not be decided, as Neave was obliged to leave 

 before they reached maturity. They were captured during Decem- 

 ber, January, and February in some swampy ground on which a patch 

 of maize was growing. These larvae were of fair size, some 30 mm. in 

 length ; the syphon was very short and had a distinct pigmented ring 

 on the anal segment resembling that in HcBmatopota larvae. In the 

 more mature specimens traces of intersegmental pigment were present. 



At the time these larvae were captured no other larvae of so large a 

 species were obtainable, and as Dorcalcemus fodiens is the only large 

 tabanid which is on the wing in March and April, there are grounds 

 for thinking that the larvae belonged to that species. 



Gastroxides ater Saunders. — A black species of a genus allied to 

 Chrysops, with elongate slender legs and long antennae, occurring in 

 Pusa, Bengal, India (Maxwell-Leffroy and Kowlett, 1909). The 

 larva is said to breed in hollow trees. No more details are available. 

 A picture of the adult is given by Maxwell-Leffroy and Howlett. 



^^ In the summer of 1916 I found eggs of another species of Chrysops which 

 dififered considerably in appearance from the two types described hitherto. 

 These eggs were found on the under surface of leaves of the yellow pond lily 

 {Nuphar), four or five clusters in all, and one on a Poniederia leaf. The 

 eggs were white, and placed vertically on the surface of the leaf, one beside the 

 other, the cluster being roundish when seen from above, presenting an even 

 dull white surface formed by the tips of the eggs, and with clean-cut vertical 

 outer walls. After a few hours these egg clusters turned somewhat brownish, 

 but never became very darl^. In one case the female fly was observed oviposit- 

 ing, but escaped before being captured. It appeared to belong to Chrysops tini- 

 vittahis or possibly Chrysops lugens. The larvas hatched within 5 days, molted 

 soon after hatching, and did not differ appreciably from those of Chrysops callidus. 



For further details see Marchand, J. N. Y. Entomol. Soc, 1917, xxv, 149. 



