REPORT OF THE STATE ENTOMOLOGIST I9IO 93 



later the embryo extended from the fifth to the thirteenth segments 

 of the mother lavra, the cells being arranged in indistinct rows 

 and larger at the extremities. Owing to its position, it was im- 

 possible to properly illuminate this mother larva. The ocular spot 

 and fuscous head were observed on the 30th and an active, well- 

 developed larva seen January 2d, which remained within the skin 

 of the mother larva till the 12th, an unusually long period, due 

 possibly to the mother larva being partially surrounded by vaseline 

 and therefore deprived of a proper supply of oxygen. 



Three months after the establishment of the cell containing the 

 larvae discussed above, their progeny were living under substantially 

 the same conditions and gave every indication of producing young 

 in due time. 



A large, white, active larva was isolated under another slide 

 December 12, 1910 with the conditions practically as outlined 

 above. Six days later this larva had worked itself to the margin 

 and become practically inclosed in a vaseline, water-filled cell where 

 it remained for over a month, namely till January 20th. The de- 

 velopment was unusually slow, probably due in large measure to the 

 deficient supply of oxygen. Young, oval embryos were observed in 

 the region of the sixth and seventh body segments December 19. 

 On the 24th several embryos were found on the venter in the 

 region of the tenth or eleventh segments, each with a length nearly 

 equal that of the body diameter. There was a gradual increase in 

 length and on the 26th one extended from the eleventh to the 

 fourteenth segments of the mother larva. The adipose tissue was 

 yellowish and reticulate by the 29th, though no signs of ocular 

 spot or mouth parts were to be seen. January 2d a slight row 

 of cells was visible in one embryo, this median streak becoming 

 more apparent on the 5th. Extended masses of large, cuboidal 

 cells were observed on the 7th, the ocular spot showing as a pair of 

 niinute, brownish spots. On the i6th well formed, embryonic 

 heads and brown ocv/iar spots were visible. This appeared to be 

 about as far as development could go without additional oxygen, 

 and though the vaseline cell was ruptured on the 20th no larvae 

 escaped. The record is interesting since it gives an idea of the 

 vitality of these larvae under adverse conditions. 



Another quiescent, white larva containing at least two embryos 

 was isolated December 12, 1910. The adipose tissue was granular 

 and irregular. On the i6th the larva was nearly filled with 

 whitish transparent embryos, the latter with a distinct median 



