REPORT OF THE STATE ENTOMOLOGIST I9IO 99 



tions were visible in the body of the mother larva. The next day 

 a series of moderately large, cuboidal cells were observed near the 

 posterior extremity. This tissue became more distinct as develop- 

 ment progressed, it becoming more evident by the 21st and occu- 

 pying a still more prominent place the 23d and 24th. On this latter 

 (late two-thirds of the posterior portion of the embryonic body were 

 filled with this tissue, somewhat as illustrated on plate 35, figure 2. 

 The masses of adipose tissue on either side commenced to develop 

 and eventually overspread and apparently absorbed in considerable 

 measure the substances of the mesodermal tissue, a portion of 

 which apparently develops into the ovaries. The embryonic di- 

 gestive tract, apparently marked by large-celled tissue, appeared 

 on the 27th to be nearly continuous throughout the entire length 

 of the embryo. The embryo had shrunk a perceptible distance 

 from the ends of the amniotic sac and the developing extremities 

 were observed. The lobes of the antennae were recognized the 

 following day as obtuse, buttonlike projections having a length 

 less than three-fourths their diameter. Two days" later the an- 

 tennae had a length a little greater than their diameter; the ocu- 

 lar spots were indicated by indistinct, submedian, pigmented areas ; 

 the lobes of the brain could be traced; the salivary glands were 

 submedian, narrowly lanceolate masses of large, glistening cells 

 lying in presumably the sixth or seventh segments of the embryo, 

 while the mesodermal tissue had retracted somewhat. The posterior 

 extremity of the embryo was also well defined. February ist 

 there Vv^ere three distinct rows of embryonic tissue, the two strips 

 of adipose tissue and the large-celled mesoderm, the latter being 

 less extensive the following day and largely obscured by adipose 

 tissue on February 3d. There was a slow development from this 

 time subsequently. On the 8th the ocular spots were light brown, 

 diffuse, and the semitransparent mouth parts well developed, a 

 fuscous appearance showing on the 9th. This embryo failed to 

 escape from the mother larva. 



The embryo in larva C extended from the third to the eleventh 

 segments of the mother larva and had a distinct median streak 

 January 17th. The latter on the 20th was seen to be composed of 

 smaller, dark cells. The next day the embryO' extended from the 

 third to the middle of the twelfth segment of the mother larva. 

 Development continued until the 27th, at which time it was nearly 

 in the condition illustrated on plate 35, figure 2, the posterior por- 

 tion being largely occupied by the mesodermal tissue. The an- 

 4 



