74 Maine Agricultural Experiment Station. 1917. 



lected, but were not reared to maturity. The pupae of the two 

 genera vary considerably in some respects, but are very similar 

 in others. They have the maxillae very short, about one-third 

 the length of the wings. The legs are of normal length, both 

 the prothoracic and mesothoracic meeting on the meson caudad 

 of the maxillae. The antennae are about the width of the pro- 

 thoracic legs at their proximal end and are gradually narrowed 

 towards the tip. They are slightly longer than the mesothoracic 

 legs. The tips of the metathoracic legs are always exposed. 

 The metathoracic wings are always visible on the ventral sur- 

 face of the body. They meet on the meson caudad of the meso- 

 th5racic legs and then separate to show the metathoracic legs. 

 They are also visible along the caudal margin of the mesothor- 

 acic wings. The thorax is of normal length and the mesothor- 

 acic spiracles are slit-like. The abdomen is punctate, with a 

 dorsal furrow present between the ninth and tenth segments. 

 This furrow is never as well-defined as in the Geometridae. The 

 abdominal spiracles are usually quite large and in a straight line. 

 No spiracular furrows are present. A cremaster is always pres- 

 ent and may or may not have hooked setae. 



So far as known the members of this family do not pupate 

 in the ground, but in a thin cocoon, or attached to a web of silk 

 by the cremaster. The genera described here may be separated 

 as follows : 



a. Cremaster with prominent hooked setae ; prothorax with a 

 prominent median ridge which shows as a median cephal- 

 ic projection on the ventral surface; body densely covered 

 with whitish bloom. Falcaria, 



aa. Cremaster without prominent hooked setae ; prothorax 

 without a prominent median ridge, the front having two 

 prominent cephalic projections ; body never with bloom 

 on any part of its surface. Drepana. 



Genus FALCARIA Haworth. 



Body of usual shape, and densely covered with a whitish 

 bloom ; face-parts slightly elevated, an irregular tubercle on 

 the front adjacent to the proximal end of each antenna; caudal 

 portion of the clypeal region distinctly elevated to form a large 

 rounded tubercle ; prothoracic leg extending cephalad between 



