Dec., *08] ENTOMOLOGICAL NEWS. 465 



The larvae I divided into three lots, the first was placed in 

 earth entirely submerged in water, the second in dampened 

 sand without food of any kind, the third in a jar of damp earth 

 together with some small angle worms. 



Twelve hours later the first lot were all dead, both of the 

 other groups were lively and apparently in good condition, the 

 second group continued to live without food for about ten days 

 and then died. The remaining group lived for some weeks 

 but finally died also, the angle worms being alive and unin- 

 jured. 



From which I conclude, that in all probability the larva is 

 terrestrial and the period of incubation is from seven to ten 

 days. 



Prof. J. S. Hine kindly determined the fly for me. The 

 eggs, which are deposited upon the under surfaces of the 

 leaves of various herbaceous plants and trees, in a three-sided 

 pyramidal heap, are yellowish-white in color, about 1.5 mm. in 

 length, slender, slightly curved and resemble those of many 

 other flies in general appearance. One of the heaps contained 

 534 e b& s by actual count. 



The freshly hatched larva is slightly more than 2 mm. in 

 length, slender but capable of contracting its body into an al- 

 most spherical mass ; in color it is pale yellowish-white, semi- 

 translucent. The head, which is capable of being entirely with- 

 drawn into the first thoracic segment, bears several pairs of an- 

 tenna-like appendages and an obtusely pointed chitinous hook. 



On each side of the median line of the body, within the sec- 

 ond thoracic segment, there is a distinct pinkish spot, also on 

 the last segment there is a pair of round black spots resembling 

 stigmata ; elsewhere the body seems to be absolutely devoid of 

 hairs or tubercles. 



EXPLANATION OF PLATE XXII. 



a Dorsal view of female. 



b Front view of head. 



c Lateral view of same. 



d Top view of egg cluster. 



e Dorsal view of young larva. 



/ Dorsal view of ist thoracic segment, head nearly concealed. 



g Lateral view of head and mouth parts. 



