ZooL— Vol. II.] COLEMAN— DACTYLOPIUS SEQUOIM, 415 



7. The Adult Female (fig. 6). — The adult female 

 just before impregnation is rather long and slender as com- 

 pared with the male propupa stage. The length is then 

 about 1.8 mm., width about i mm. After impregnation 

 there is a considerable shortening of the body and a conse- 

 quent broadening as the eggs develop. The shape of the 

 unimpregnated female is almost a perfect oval as to dorsal 

 and lateral outlines, the ventral a nearly flat surface. 



In the live insect the color is a characteristic gray. The 

 abdominal segments are distinctly marked dorsally, although 

 the lateral margins show almost no indentation. 



The antennae are rather slender, about .65 mm. in length, 

 and eight-jointed, — formula, 8, (2, 3,) 7, (4, 5, 6,) i. The 

 number of hairs and their arrangement on the segments are 

 about as described for the first larval stage. The eyes are 

 prominent though not very large. The legs have not devel- 

 oped in proportion to the size of the body. The shape and 

 relative lengths of the different segments are about as in the 

 first larval stage, except that the tibi« are now longer than 

 the tarsi. The claws terminate in distinct hooks and have 

 the two knobbed hairs, or digitules, at the base on the ven- 

 tral side. There is a single long hair at the distal end of 

 the tarsus, on the dorsal side (fig. 6, a). 



The anal ring bears six long hairs as in the young, and 

 the marginal lobes of the eighth segment each bear a single 

 long hair, with two shorter ones at the base. 



The head, thorax, and abdomen are covered with short 

 hairs, and on the caudal margin of each abdominal segment 

 is a row of longer hairs. A few scattering long hairs are 

 visible on the thorax and head. 



II. Life-History and Habits. 



I. The Young Larva. — The young larvae within the 

 egg-sac were quite active soon after hatching, crawling 

 about over the unhatched eggs. In a few days they left the 

 egg-sac and ran about over the leaves and twigs. In a week 

 or ten days after the first young appeai-ed all were hatched 

 and had entirely deserted the egg-sac. Those hatching on 



