42 Maine Agricultural Experiment Station. 1917. 



the maxillae and meeting on the meson caudad of them, often 

 separating to show a small portion of the tips of the metathor- 

 acic legs ; both prothoracic and mesothoracic legs extending 

 cephalad between the sculptured eye-pieces and the antennae ; 

 antennae reaching to the caudal margin of the wings and meet- 

 ing on the meson ; prothorax about half the length of the mes- 

 othorax ;■ mesothoracic spiracles with the caudal margin elevated 

 and somewhat flaring; abdominal segments 1 to 8 densely punc- 

 tate ; abdominal spiracles elliptical, slightly produced ; spiracular 

 furrows present on segments 5 to 7, the surface of the furrows 

 punctate like the remainder of the segment ; furrow present on 

 the dorsum between the ninth and tenth abdominal segments, 

 the edges very finely serrate ; cremaster triangular in outline, ru- 

 gose, with two large long hooked spines at the distal end, at 

 the base of these two stout hooked setae, and cephalad of these 

 two hooked setae near each lateral margin, forming a transverse 

 row. 



This genus consists of a single species in North America. 



AN I A LI MB AT A Haworth. 



The Horned Span-worm. Fig. 2, E and H. 



General color light brown, with darker brown markings, 

 most of these small, irregular spots ; antennae with dark brown 

 inverted V-shaped markings ; ventral surface of abdomen show- 

 ing three broad stripes, the mesal one more distinct than those 

 near the lateral margin ; dorsal surface of abdomen with broad, 

 indistinct, oblique bands of a lighter color; bases of the setae 

 dark brown, and usually the distal portion of the cremaster ; 

 antennae slightly elevated, with a row of minute tubercles along 

 the middle line ; abdominal segments 1 to 8 finely, densely punc- 

 tate, the ninth and tenth segments smooth ; segments two and 

 three with a more or less distinct tubercle on each side the 

 meson indicating the scars of the larval filaments ; segments 

 five, six and seven with a distinct elevation along the cephalic 

 margin ; dorsal furrow between segments nine and ten with a 

 lateral extension, the caudal margin (Fig. 2, H) notched on the 

 meson and slightly serrate ; cremaster 1 mm. long, slightly ru- 

 gose, and showing a slight constriction on each lateral margin 

 at the base. 



