48 



PACKARD, 



flattened above, the posterior portion of the third thoracic 

 ring being cylindrical and continuous with the abdomen, 

 the flattened portion beginning near the posterior margin 

 of the segment, and being regularly rounded, the edge of 

 this flattened portion extending diagonally forwards on 

 the sides. The under surface of the thorax is convex and 

 rounded continuously with the abdomen ; the 1-4 abdom- 

 inal rings are equal in size and length ; the fifth is much 

 smaller, with very large feet ; the sixth segment is half 

 as thick as the fifth, and the legs are reduced to mere 

 booklets, like those on the basal segments of the abdo- 

 men. The respiratory 

 tube arises from the 

 base of the seventh seg- 

 ment; it is directed a 

 little backwards, while 

 posteriorly the seventh 

 seo;ment curves around 

 to the insertion of the 

 large anal feet which 

 are crowned with a cir- 

 cle of hooks. There is 

 one pair of thoracic 

 tubercles armed with 

 black hooks. The mid- 

 dle pair of abdominal 

 feet, or tubercles, are 

 placed a little farther 

 apart than the others. On the back of the second thoracic 

 segment is a pair of narrow black stripes, extending 

 faintly to the middle of the next segment, and on the 

 2-5 abdominal segments is a pair of irregular squarish 

 black spots, united into one on the fifth segment. The 

 color is a pale horn ; there are very minute hairs giving 

 the skin a finely shagreened appearance. Length of body 

 .38; of the respiratory tube .12; total, .50 of an inch. 

 The pupa can be seen, with the head of the future fly 

 beneath the last thoracic segment of the puparium, while 

 the tip of the body of the pupa rests beneath the fifth 

 abdominal segment. 



