EGG AND LARVA OF HESPERIA JUBA BDV. 
123 
showed a small black spot which increased to half the diameter 
of the egg by the morning of July 9. The larva emerged some 
time during that day and had eaten ail of the free portion of the 
egg shell when it was observed at 5:00 p.m. 
First Instar: Newly hatched larva 2.3 mm. long, 0.5 mm. 
in greatest diameter. Color yellowish white with black setae. 
First segment brownish with black cervical shield. First pair 
of legs black, second pair distinctly suffused with blackish and 
third pair slightly so. It was difficult to make definite observa- 
tions of the setae with only a hand lens, but the following may be 
quoted from notes made in the field: 
On the anal plate there is a marginal row of six setae, the next to 
the outermost long (0.3 mm?) and upturned. All others perhaps 
not over 0.1 mm. long. Against the pale body they appear dark — it 
is certain, at least, that they arise from tiny dark tubercles — but 
against the green of a leaf they appear shining and pale, with enlarged 
whitish tips. 
This suggested glandular hairs, but a lens could not verify the 
point. The setal map (fig. 4) shows the arrangement of the 
setae of an abdominal segment. It was checked so carefully, 
even in bright sunlight, that probably nothing was omitted 
which could be seen under the low magnification available. 
Diameter of head capsule 0.6 mm. 
Second Instar: The first stage larva began its moult on 
July 14 and completed it before the morning of July 16. In the 
second instar all primary setae excepting the two longest on the 
anal plate were either lost or obscured by the sparse coat of 
short, dark secondary setae which had appeared. The skin was 
yellowish and transparent, the general appearance greenish, 
due to the contents of the alimentary canal. The head, first 
segment and thoracic legs were extremely dark brown, almost 
black; the first segment was marked with a transverse anterior 
line, whitish in color. Diameter of head 0.8 mm. 
Third Instar: The second moult began on July 22 and, like 
the first, was completed before the larva was examined on the 
morning of the second day thereafter, viz., July 24. In the 
