186 THE EARLY STAGES OF TABANID^ 



vein is nearly twice as long as the marginal, and about half the 

 length of the postmarginal. Funicle 1 is half as long again as it 

 is wide, two-thirds the length of the pedicel. No. 2 a little shorter 

 than No. 1, No. 3 still shorter. No. 4 globular, smallest, No. 5 cup- 

 shaped. No. 6 the same, larger, wider than long, Nos. 7 and 8 sub- 

 quadrate. No. 9 ovate, longer than wide. Short distinct striag at 

 base of segment No. 2 of the abdomen. 



In the male, Funicles 1 to 3 are somewhat longer than in the fe- 

 male, while Nos. 4 to 9 are moniliform, wider than long, small; the 

 club joint is ovate and as long as Funicle 1 and stouter. 



Described from a large number of both sexes reared from tabanid 

 eggs at Dallas, Texas (Bishop), 



Types. — Catalogue No. 19,664, U. S. N. M., one male, eight females, 

 on two tags and a slide bearing one male, four females. 



Types of opacus, ovivorus, floridanus, and fiavipes examined. 



Telenomus benefactor Crawford. — Patton and Cragg (1913), (page 

 298), say that Telenomus benefactor Crawford is another chalcid 

 which parasitizes the eggs of tabanids in the Sudan. 



Telenomus kingi Crawford. — This species has been reared from eggs 

 of Tabanus kingi. 



Unidentified Parasites Recorded. 



Chalcid sp. 1. King (1910) has bred, from an egg mass of Tabanus 

 tceniola, taken at Gebelein, numbers of a small Hymenopteron, which, 

 in 1910, had not been identified, but was figured, together with the 

 parasitized egg mass, showing the exit hole of the parasites. As the 

 insects are figured in natural size, not much can be said about struc- 

 tural details (see Plate 1, Fig. 8, and text, p. 170). 



Chalcid sp. 2. In Madras, a similar insect, which has not been iden- 

 tified (Patton and Cragg, 1913), regularly destroys large numbers of 

 egg masses of Tabanus albimedius and Tabanus striatus. 



A parasitized egg mass can be recognized, according to Patton and 

 Cragg, by the almost black color which it assumes when the devel- 

 opment of the embryos of the Hymenopteron is almost complete. 



Chalcid sp. 3. A hymenopterous parasite has also been found to 

 infest the eggs of Goniops chrysocoma (McAtee). Consequently the 

 phenomenon seems to be quite general. 



