842 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



Duiiiig the past summer (1887) I have found this caterpillar most fre- 

 quently on the common bush juniper in Maine, but in former years have 

 beaten the chrysalids out of the trees already mentioned. 



The caterpillar is found in July, but becomes fully grown from the 

 1st to the 15th of August. Before transforming, it spins the leaves 

 together with a few coarse silk threads and remains in the tree. Those 

 reared on the juniper became chrysalids by the 19th or 20th of August, 

 and the moths appeared by the 9th of September, so that the pupa 

 state lasts about three weeks. The moths continue to appear until the 

 middle or last of September. Those found on the spruce appeared Sep. 

 tember 15, and a pupa found on the white pine disclosed the moth Sep- 

 tember 13. Probably by the middle of September all the moths have 

 appeared. Whether they hibernate and lay their eggs in spring, or 

 whether their eggs are laid in the autumn on the terminal twigs, and 

 the species is alone represented during the winter by the eggs, remains 

 to be ascertained. 



The moth is easily recognized by the sharp fore wings with the nar- 

 row, dark, mesial band, which is black and very narrow on the inner 

 edge, and by the pale zigzag line re-appearing beneath, also by the 

 black streak near the apex and a smaller apical black dot. It is closely 

 related to the European T. juniper ata, which feeds on the common 

 juniper. 



Larva. — Body smooth, cylindrical ; head smooth, slightly bilobed, not quite so 

 wide as the body. Head and body green, the color of the upper side of the juniper 

 leaves on which it feeds. A broad pale glaucous white dorsal baud, on each side of 

 which is a yellowish-white line, which extends along the sidesof the supra- anal plate, 

 but not meetiug its fellow at the apex. Anal legs broad and large, green, with two 

 tubercles which are large and rounded conical. Thoracic legs pink. Length, 16™™. 



Pupa. — Of the usual family shape ; green, with a white lateral stripe from the head 

 to the tip of the abdomen, and another lower down along the abdomen, as well as 

 two parallel dorsal whitish stripes. Abdominal spine larger and longer than usual, 

 flattened vertically, acute, surface corrugated ; two stout terminal bristles excurved 

 at the ends, a much smaller pair at base of these and along the sides of the spines two 

 additional pairs. Length, 6™™. 



Moth. — Pale ash, base of fore wings with two bent parallel black lines, the outer 

 heavier, and marked with longitudinal stripes on the veinlets. Beyoud is a broad 

 pale band slightly bent on the median vein. Still beyond is a median band margined 

 with black, narrowing more than usual on the inner margin of the wing, where the 

 two black margins meet, forming two contiguous black patches; in front the baud 

 incloses obscure ashen ringlets. A black discal dot ; beyond, an obscure pale patch- 

 A white zigzag marginal line, the sharp scallops inclosing dark dots. Hind wings 

 uniformly pale ash color, crossed by two dusky lines. Expause of wings, !i5'"™ (one 

 inch). 



23. Eupithecia larva. 



This caterpillar was beaten from spruce trees June 11, at Beede's, 

 Adirondacks. 



Larva. — Body very slender. Head much flattened, as wide as the body in front, 

 the latter widening a little towards the first pair of abdominal legs. Supra-anal plate 

 ending in two large long spines ; lateral ridges distinct, narrow ; below it a little 



