118 THE OLIVE 



of fourteen rings. The mouth is furnished Avith two sharp, scaly 

 black hooks (Fig. 10 a,) and on either side the base of the second 

 ring there is a calix-formed papilla, (Fig. 10 b,) the edges of which 

 are scalloped. The twelfth ring is the broadest of all. The thir- 

 teenth has small papillae on each side. The last ring is the smallest 

 and from a back view shows the anus and two lower false feet. The 

 tracheal canals run in a flexuous line to the thirteenth rino; where 

 they connect, near the papillae, with a transversal canal. The gen- 

 eral color of the body is a dirty white. The teguments are so trans- 

 parent that the tracheal and alimentary canals can easily be ob- 

 served. The papilla on the second and thirteenth rings are red- 

 dish in color. Maximum length a trifle over a quarter of an inch. 

 The pupa is an elongated ovoid in shape. The first and last rings 

 are visible only from a ventral view. (Fig. 11, 11 a, 11 b.) The 

 papillae of the second and thirteenth rings retain their primitive 

 form. All the rings are fluted transversely. 



In the first period the pupa is of a dirty white tinge, but changes 

 to a light yellow, the papillae remaining red as does the orifice of 

 the anus. Its length is one-seventh of an inch. 



The head of the perfect fly (Fig. 12.), is a little broader than the 

 anterior part of the thorax. The eves are larw and black, anten- 

 nae three jointed. Its color is sometimes a light straw, and at oth- 

 ers a deep yellow. 



Of the three joints (Fig." 12 r/.), the first is short, the second a lit- 

 tle longer, the third twice as long as the second, and ending in a 

 flexuous bristle, longer than itself 



Upper thorax gray, with three lengthwise black lines. Back of 

 abdomen, specked with black, with a lengthwise band, and lower 

 edges of the first two rings a deep yellow. Ventrical, a dirty dark 

 yellow. Wings glossy, with blotches of brown in apex, sometimes 

 another blotch on lower edge, at the extremity of the anal nerve. 



The roots of tlie wings are a pale yellow. Feet light, tarsi a lit- 

 tle darker. The borer and ovisac (Fig. 12 /;.) is about the same 



