32 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 95 



in the curved row, counting from either end, approximately an 

 equilateral triangle. 



The shield on the first thoracic segment bears numerous short 

 hairs. The detached ends of the thoracic shield are enclosed with the 

 rest of the shield in a thick pad of skin and are not readily identifiable. 



Above the anterior to the large prothoracic spiracle, in the center 

 of the detached end of the thoracic shield, is a small, smooth, circular 

 indurated spot surrounded by a circle of well-spaced hairs which are 

 distant from it somewhat more than its own diameter. This spot is 

 directly " northeast " of the spiracle on the right side, and " north- 

 west " on the left. It is distant from the spiracle nearly the longer 

 (vertical) diameter of the latter and lies in a vertical plane about its 

 shorter diameter in advance of it. 



There is another similar but less conspicuous spot below this, 

 directly in front of the middle of the spiracle. 



Directly beneath this, near the ventrolateral border of the segment 

 and over the base of the first pair of thoracic legs, are two similar 

 but larger spots with a diameter nearly twice as great. These are 

 distant from the spiracle nearly twice its greater diameter and are 

 about half their own diameter apart. One of them is higher than, and 

 in advance of, the other. 



Below and anterior to the first abdominal spiracle — " southeast " 

 on the right side and " southwest " on the left — and distant from it 

 about its shorter diameter is a similar spot of the same size as the two 

 last mentioned. On the segments following, this spot is considerably 

 lower, being distant from the spiracle about twice its longer diameter, 

 the distance slowly increasing as the spiracles gradually decrease in 

 size posteriorly. On the eighth abdominal segment the spot is directly 

 beneath the enlarged spiracle, which is situated at a higher level than 

 the spiracles preceding, and is distant from it nearly twice its longer 

 diameter. 



In the middle of the outer side of the large middle segment of 

 each of the prolegs is a similar, but smaller, spot, that on the terminal 

 prolegs being larger than the others. 



On the ventral surface there are two similar spots on each of the 

 two first abdominal segments situated one on either side on a line 

 between the middle of the bases of the last thoracic legs and the first 

 prolegs, and there are two similarly situated on the segment between 

 those bearing the fourth pair and the terminal prolegs. There are 

 also two on the dorsal side of the last segment. 



The body is clothed with very numerous but well-spaced short, fine, 

 pointed hairs, among which are numerous much longer, scattered, 



