72 



The Miitilids above were of different species, accordino; to 

 the best available literature on this family — the male being 

 Mufilhi ca.sfor Blake, and the female MutiUa fernigata Fabr. 

 From the fact of breeding them both from the same lot of Elis 

 cocoons, collected in the same field, and that each was described 

 only on the one sex, I am inclined to the o])inion that these are 

 the sexes of one and the same species. Further observations l\v 

 those working on white grubs and their parasites in Illinois 

 would be of much importance. I have not previously seen any 

 reference to a Mutilid being parasitic on a Scoliid. 



Dragonflies and Their Food 



15V AI.KRED WARREX. 



During the latter part of iDlo and the first part of 1!)1-1- the 

 wj'iter carried on some research work'^^ for the purpose of obtain- 

 ing definite data on the range of food of the local dragonflies, 

 particularly of the two common lowland species, Anax jiiDiiift 

 Drury and Pantala flavescens Fabr. The following is a brief 

 summary of these investigations. The food habits of the above 

 species of dragonfly were studied in both the nymphal and adult 

 stages. With the nymph, examination of the contents of the 

 alimentary canal was the chief method eniployd to ascertain 

 what the dragonfly lives on during this period of its life ; while 

 with the adult, two methods were employed, viz., examination of 

 the contents of the alimentary canal and field observation. In 

 the pursuit of these investigations, it was aimed to cover as 

 much territory around Honolulu as time and circumstances 

 would |)ermit, so as to include as many as possible of the varied 

 conditions under wliich the dragonflies find their food on the 

 lowlands. 



EXAMI.XATIOX OF TlIK CoXTEXTS OF THE AEI>rEXTARY 

 Caxae of Xy.MI'IIS. 



In this connection ooT) nym])hs', 41 Ana.v and 2!)4 PfdifaJa 

 were dissected for the purpose of examiuiug the alimentary 

 canal. Out of th(> 41 s]iecimens of Aikij-. <• were found to have 



■■= This work was carried on in connection with a course in ento- 

 mology at the College of Hawaii in partial fulfillment of the require- 

 ments for the degree of M. S. 



Proc. Haw. Ent. Soc. Ill, No. 2, July, 1915. 



