58 MAINE AGRICULTURAL EXPERIMENT STATION. 1917. 



make an earthen cell, but no traces of cocoons were found. The 

 adults emerge late in the fall and lay the eggs, which do not 

 hatch till spring. 



Family NOTODONTIDAE. 



The pupae of this family vary considerably, and there is 

 no one character which will serve to separate them from those 

 of the nearly related families. The prothoracic and mesothor- 

 acic legs are of the normal length for lepidopterous pupae, the 

 prothoracic legs about half that of the wings and the mesothor- 

 acic legs slightly longer. The labial palpi often show a very 

 small portion caudad of the labrum. The maxillae seldom reach 

 the caudal margin of the wings and are usually less than three- 

 fifths their length. The antennae are broadest at their proximal 

 ends, and there the width exceeds that of the prothoracic legs. 

 They seldom reach the caudal margin of the wings, and their 

 tips often lie adjacent on the meson caudad of the other appen- 

 dages. The mesothoracic leg never reaches cephalad to the 

 eye-pieces, but the prothoracic leg always does. The latter 

 seldom extends cephalad between the sculptured eye-piece and 

 the antenna. The abdomen is usually punctate and only shows 

 a dorsal furrow between the ninth and tenth segments in the 

 genus Datana. The mesothoracic spiracles are usually slit-like 

 and seldom, if ever, show an elevated ridge or tubercle adjacent 

 to the caudal margin. The abdominal spiracles are seldom pro- 

 duced and always in a straight line. Spiracular furrows are 

 never present. A few members of this family have no cre- 

 master, but usually a short cremaster is present. The presence 

 of hooked setae on the cremaster is the exception in the Noto- 

 dontidae, as most of them pupate in the ground. 



The colors vary but little in this family, nearly all being 

 chestnut-brown, but a few are nearly black. None of the species 

 known have prominent markings on the body. The genera of 

 Notodontidae may be separated as follows : 

 a. Maxillae one-third or less the length of the wings; both 

 prothoracic and mesothoracic legs meeting on the meson 

 caudad of the maxillae ; abdomen very finely punctate. 

 b. Thorax and abdomen thickly covered with very fine short 

 setae ; cremaster a stout spine about one millimeter in 



