72 



The jNIiitilids ahovc were of different species, according" to 

 the best available literatnre on this family — the male being 

 Mutilla castor Blake, and the female Mutilla ferrugata Fabr. 

 From the fact of breeding tliem 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 opinion that these are 

 the sexes of one and the same species. Further observations by 

 those working on Avhite grnbs and their parasites in Illinois 

 would be of much im]iortance. I have not previously seen any 

 reference to a Mutilid being parasitic on a Scoliid. 



Drag-onflies and Their Food 



BY ALFRED WARREX. 



During the latter part of 191-3 and the first part of 1914 the 

 writer carried on some research work" for the ])urpose of ol)tain- 

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

 particularly of the two common lowland species, Anax Junius 

 Drury and Pantala fkivescens Fabr. The following is a brief 

 summary of these investigations. The food habits of the al)Ove 

 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 employd 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 alimentarj' canal and field observation. Tn 

 the pursuit of these investigati(ms, it was aimed to cover as 

 much territory around Honolulu as time and circumstances 

 -would permit, so as to inclnde as many as possible of the varied 

 conditions under which the dragonflies find their food f)n the 

 lowlands. 



Exa:\iixati()\ ok the C\)xtexts of the Aetatextary 

 Caxal of XY-Arriis. 



In this connection 08') nym])hs, 41 A ikij- and 1^94 Puiitnla 

 were dissected for the pui'pose of examining the alimentary 

 canal. Out of the 41 specimens of Ana.r. 6 were fonnd to have 



* This work was carried on in connection witla 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, 191.5. 



