DraQonjiies and their Prey. 



243 



however — individuals, that is, which are free alike from 

 pruinosity and discoloration — it is seen that chrysostigma 

 lacks tlie mid-dorsal black Hue and certain other black 

 markings which characterize the abdomen of brachiale. The 

 condition of the Nyasaland specimens now under considera- 

 tion does not permit of any useful comparison of abdominal 

 markings being made, either between themselves or with 

 suitably preserved material of chryHosttgma and brachiale 

 from other localities. 



The older males of hraehiale fi'om the Lingadzi have the 

 distal two-thirds of their Avings tinged with brown. In the 

 female sex the colour is more intense and suffuses the entire 

 wing. In the males of chrysostigma from Monkey Bay the 

 wings remain clear, and very little colour makes its appear- 

 ance in the wings even of the females. 



The eyes of the Lingadzi brachiale are decidedly green in 

 both sexes, whereas the eyes of the chrysostigma from Monkey 

 Bay are consistently brown. I have no notes as to the eye- 

 colours in the living insects. 



The entire collection of captors and prey, set out in the 

 subjoined tables (pp. 243-245), has been presented to the 

 British Museum (Natural History) by the Imperial Bureau 

 of Entomology. 



From the Lingadzi Biver District, Nyasaland [Dr. W. A. Lamborn). 



Collector's 

 no. 



Species of Odonata. 



Species of Prey. 



Date. 



42 a. 

 42 b. 

 42 c, 

 42 a!. 



42 e. 



42/. 



42 (;r. 



42 h. 

 42 i. 



42/. 

 42'A-. 



42/. 



Orthetrum brachiale, P. de B., ^ . 

 O. brachiale, S • 

 O. hraehiale, S • 

 O. brachiale, S • 



(). brachiale, ^ . 



O. brachiale, J . 



0. icteromelas, Ris, J ■ 



O. icteromelas, $ . 



O. chrysostigma, Biirm., § 



0. brachiale, ^ . 

 O. brachiale, c? • 



O. brachiale, c?. 



Glossina morsitans, Westw. 



G, morsitans. 



An undetermined Asilid fly. 



A Tachinid fly (Setulin fasciata, 



Meig.). Identitied by Dr. J. 



Villeneuve. 

 A Tachinid fly {Tachi/i a STp. — in 



poor condition). 

 A Tachinid fly {Sarcoj:>ha(/a sp., $ 



— indeterminable). 

 The Tabanid fly Tabamis fiiscipes, 



Ric. 

 Glossina morsitans. 

 A Tachinid fly (Setulia fasciata, 



Meig.). Identified by Dr. J. 



Villeneuve. 

 An undetermined Aeilid fly. • 

 A Syrphid fly {Lathy rophthalmns 



sp., near metallescens, Loew). 

 A Syrphid fly {Melanostoma ?Jlori- 



peta, Speis.j. 



16* 



10, 

 10. 



1]. 



12. 



12. 



14. 



15. 

 16. 



17. 

 17. 



ii. 15. 

 ii. 15. 

 ii. 15. 

 ii. 15. 



ii. 15. 



ii. 15. 



ii.15. 



ii. 15. 

 ii. 15. 



ii. 15. 

 ii.15. 



19. ii.15. 



