356 MR. C. F. M. SWYNNERTON ON THE 



Exp. 180. — December 11. Refused without tasting a housefly and the following 

 flies : — Morellia prolectata, AntJiomyia sp,, Pycnosoma sp., and an Anthomyiid, ate 

 readily Alcimus ruhiginosus, tried and rejected a hive-bee twice, tried and rejected 

 Mylabris oculata^ again persistently refused without tasting all the above flies, 

 seized a large Oarabid, Teifflas hacquardi, but at once threw it away and remained 

 gasping on her perch for a couple of minutes, then ate readily a grasshopper 

 i^Gatantops), tried and rejected and then persistently refused without tasting a 

 hive-bee, refused persistently without tasting all the above flies, tried and rejected 

 Zonocerus elegans. 



Later, refused emphatically without tasting, then tried and rejected a fly 

 {^Pycnosoma chloropygci), persistently refused without tasting a house-fly, refused 

 without tasting, tlien tried very thoroughly and finally rejected, a Syrphid fly, 

 doubtful. She then persistently refused without tasting a hive-bee, ate readily an 

 Asilid, Microstyluin validum, refused without tasting, then tried and rejected, the 

 Syrphid, refused emphatically, then barely tried and rejected vs^ithout tasting 

 another fly, ate readily Alcimus Q^ubiginosus, readily ate nearly 40 grasshoppers 

 mostly small, refused to touch any more, ate readily Alcimus ruhiginosus, refused 

 quite decidedly without tasting it the Syrphid = 



[In the first experiment Alcimus ntbigiiiosus was jji'ef erred to the various other 

 Diptera used, as was grasshopper 47, and the latter was also preferred to Mylabris 

 ociolata, Teiffl-us hacqaardi, and hive-bee, against which three insects the Alcimus 

 was not pitted. 



In the second experiment A. rtibiginosus was preferred to house-fly, Pycnosoma 

 chloropyga, the Syrphid (itself probably preferred to the other two), and to hive-bee, 

 and M. validum was preferred to all but one fly, against which it was not pitted. 

 The fact that nearly 40 grasshoppers were eaten after the last of the rejections 

 shows how low the insects involved must be placed.] 



Exp. 181. — December 15. Hungry. Ate readily a moth, several grasshoppers, 

 another moth, tried well and rejected an Ortalid fly (Peltacanthina siictica), ate 

 readily a third moth, refused emphatically and persistently without tasting it a 

 housefly, tried and rejected a Hcematopota near bnmnescens , ate readily a Terias 

 regidaris captured on the Gambadziya axid a moth, and tried and rejected a blister 

 beetle, Mylabris ocidata. She then ate several grasshoppers — all to-day have been 

 eaten with disinclination — and refused any more, ate readily one of each of the 

 three Lycsenids, a Mycalesis campina, and a Terias senegalensis, but then went back 

 to grasshoppers. 



Later, having been fed on grasshoppers till she refused more, ate readily 

 Phrissura isokani, tried and rejected Aloina nyassa, and then three Lycsenids, also 

 the moth and Hcematopota near brunnescens, and refused without tasting a fly 

 {Peltacanthina stictica) and a housefly, tried and rejected a Teracolus and a Terias, 

 ate ve7'y iieadily a Pap. angolanus, and once more refused the rest without tasting. 



lOrder : — 



1. P. angolanus. 



