OF NEW ENGLAND. 121 



cinereous ; the former paler towards the internal edge ; 

 beneath both wings are nearly concolorous, the primaries 

 a little darker however, but without any markings. 

 Length of the body, .37 ; expanse of wings, .75 inch. 



Larva. Body cylindrical, tapering slightly towards 

 each end. The head is of moderate size and somewhat 

 flattened as usual, presenting the usual semi-elliptical 

 form; the three simple eyes are placed in nearly a straight 

 line parallel with the anterior edge of the pro-thoracic 

 ring. The pro-thoracic (cervical) shield is sub-lunate ; 

 each of the two succeeding rings is impressed by three 

 transverse lines, forming four transverse ridges. On the 

 abdominal rings there is but one of these impressed lines 

 like the suture between the different rings, except that it 

 extends only as far as the sides of each ring ; like the 

 sutures they are roseate flesh-colored ; there are two 

 sub-dorsal rows of minute setiferous tubercles, one on cacli 

 elevation of the ring ; and a similar lateral row the 

 pleural region is raised considerably ; of the nine stig- 

 mata, the pro-thoracic one and the last abdominal one 

 are the largest, and the pro-thoracic stigma is placed a 

 little below the line of the others ; the supra-anal plate 

 is semi-oval ; ten pairs of rather short abdominal (prop-) 

 legs. Of a pale flesh-color with the lines and sutures 

 deeper roseate. Length, .45 ; breadth, .08 inch. 



These larvae were observed Jan. 16th, twenty or more in 

 number, in a box containing the remains of a nest of 

 Bombus fervidus taken during the previous fall at Warwick, 

 Mass. The larvae had eaten up all the cells, and while 

 some were spinning their thin cocoons, which were very 

 slight compared with those of Galleria, the honey-bee 

 moth, others had died for want of food. 



Pupa. The body is obtusely spindle-shaped, since the 

 upper and under sides are continuously convex from the 

 head to the tip of the abdomen. Head prominent, the 

 front convex ; epicranial piece large and broad, convex 

 behind, on the sides deeply excavated for the insertion 

 of the antennae ; the clypeus nearly round, being convex 

 , behind and on the sides, which narrow towards the square 

 slightly concave front; in front of the clypeus is the 

 transversely narrow labrum which is a little produced in 



ESSEX INST. PROCEED. VOL. IV. P. 



