262 THE CANADIAN ENTOMOLOGIST 



Gill, H. canadensis. 



Labium and 2nd maxilla, //. tripiinctata. 

 First maxilla, //. tripunctata. 

 Mandible, H. tripunctata. 

 Labrum, //. tripunctata. 

 Hypopharynx, H. tripunctata. 

 Genitalia, H. tripunctata. 

 Gill, //. tripunctata. 



(To BE Continued.) 



A JUMPING MAGGOT WHICH LIVES IN CACTUS 



BLOOMS {ACUCULA SALTANS, GEN. 



ET SP. NOV.). 



BY CHARLES H. T. TOWNSEND, 

 Director of Entomological Stations, Lima, Peru. 



• On January 25, 1913, the writer was exploring a rocky draw 

 among the bare hills in the western base of the Andes, above Santa 

 Ana ranch house, about forty miles inland from Lima, and at about 

 4,000 feet elevation above sea. In this draw a columnar cactus 

 was found growing in bunches, probably Cereus sp., which at that 

 date showed few blooms opened, but many unopened buds. One 

 large bud evidently past opening time, and in reality a bloom whose 

 opening had been prevented by the shrivelling of the petals which 

 effectually closed it, was cut open and disclosed five maggots that 

 possess the power of jumping six or eight inches high from a hard 

 surface. The cactus buds were all numerously attended by a large 

 brown ant, specimens of which have been sent to Dr. Wheeler for 

 determination, and the closed bloom containing the maggots was 

 simply massed with the ants on the outside, much more so than the 

 buds in general, yet no entrance had been effected by them into 

 this bloom. The bloom was cut open with the idea that the ants 

 were inhabiting it, and thus the discovery of the maggots was purely 

 accidental. The maggots were found to be boring among the clot- 

 ted mass of stamens and anthers. Fermentation of the mass was 

 evident from the sour odour, but no actual putrefaction had taken 

 place. The maggots had not penetrated the septum covering the 



August, 1913 



