2 BULLETIN" 111, U. S. DEPARTMENT OF AGRICULTURE. 
dently familiar with the hornet, refused to believe that a specimen 
which had just emerged and was being observed on the tree in which 
it had attained maturity was not a "stinger" until the difference was 
pointed out to him. 
The female is about two-thirds of an inch in length and the male is 
somewhat smaller. In the female the last three segments, and in the 
male the last four, are bordered with rich lemon-yellow, which makes 
the sexes easily distinguishable, even to the uninitiated. 
The mature larva is from three-fourths inch (male) to 1J inches 
(female) long and is of a dirty white or yellowish color. 
Fig. 1. — Female pitch moth ( Vespamima sequoia) 15 minutes after 
emerging. (Original.) 
LIFE HISTORY. 
Observations on this species in different localities, together with 
the dates of emergence of adults reared in the laboratory, show that 
the general flight of the mature insects and oviposition occur between 
June 25 and July 15, the greater number of them probably flying 
about July 10. However, variation in latitude and altitude and un- 
usual weather conditions prevailing during the spring of certain years 
may put the date of this general emergence a few days ahead or 
