362 



Professor E. B. Poulton on 



VIII. DiPTERA. 



Undetermined ...... 



TipulidiB (Daddy-longlegs) 



StratiomyidiB ...... 



Tahanid/B (Horse-flies) .... 



TFemales devouring males of same sp, 

 Asilid^^ „ „ females „ 



(Prey a species different from captor 10 

 Umpid/B ....... 3 



Dolichopodidc'B 

 Syrphid^ . 

 Conopida} 

 Tachinidaj 

 Sarcofhacjinm 

 Bcxinm 

 Muscinse . 

 Antlioiiiyidx 



Total . 



2 

 2 

 5 

 1 

 4 

 6 



57 



The whole of the 226 records in the tabular statement 

 are included in this analysis, except No. 29, in which the 

 nature of the prey is uncertain. To these 225 are added 

 the 2 butterflies in the footnotes on pages 345, 346, 

 together with one extra example, because three victims 

 accompany the two Nos. 59 and 117 in the Table. Thus 

 the total number included in the analysis of prey is 228. 



A glance at the above list shows that the Hymenoptera, 

 Diptera, Coleoptera, and Lepidoptera, placed in the order 

 of importauce, make up between them y^- of the recorded 

 prey. The other Orders are of small importance, but it is 

 a striking fact that Acridiidx are the only recorded prey 

 among the Orthoptera, Cicadida3 (except for a single 

 Cercopid) among the Rynchota Homoptera. 



Hymenoptera. — About 80% of the entire records 

 belong to this order. The Aculeata are strongly repre- 

 sented, other groups except the IchneumonidiB (restricted), 

 very weakly. Among the Aculeates the Anthophila include 

 more than half the victims ; but this immense preponder- 

 ance is brought about by the numbers of Ap)i>i riicUiJica. 

 Reasons will be given below (p. 366) for the conclusion 

 that the hive-bee, weakened by domestication, is an easy 

 prey, — a conclusion supported by the fact that there is only 



