ARTHUR DEWITT WHEDON 419 



constant, and the tube is bowed upward. The remainder of the 

 thorax, the first segment «f the abdomen and a part of the second 

 segn^ent are filled by the large, oval crop which runs without in- 

 terruption into the gizzard; this seems always to be in the second 

 segment. 



The Ventriculus is much distended at the region of the gizzard 

 though not as large as the crop. Throughout the third, fourth, 

 and fifth and most of the sixth segments the ventriculus is a 

 straight tube but one-third or one-half the size of the oesophagus. 

 In the posterior part of the sixth and anterior end of the seventh 

 it enlarges a little, tapering quite suddenly to the region of the 

 entrance of the Malpighian tubules. 



The Ileum contained in the posterior end of the seventh segment 

 is usually small in diameter, but the section occupying the whole 

 of the eighth segment is much distended and possesses irregularly 

 wrinkled walls. The strong sphincter muscle at its posterior end 

 brings it to a point which projects, gizzard-like, into the rectum. 



The Fectum is shorter and smaller than the ileum and occupies 

 the most of the ninth and all of the tenth segments. 

 Reproductive System 

 (Plate XXVI, figures 25 and 2G) 



Male — The Testes are as usual long eylindrical bodies; they 

 are here very dark in color, smooth of surface, and lie quite straight 

 along the sides of the body between the anterior end of segment 

 five and the anterior or middle part of segment eight. 



The vasa deferentia are light in color, and run nearly straight 

 caudad to the beginning of segment nine, tapering off a little. As 

 they enter segment nine they begin enlarging again, and continue 

 doing so until they join the sperm sac. Viewed from the side the 

 form is often that of a reversed S. There is, howevci-, consider- 

 able variation in the exact form. 



The Sperm Sac is placed in the extreme anterior end of segment 

 nine and is cordate in shape in dorsal \iew. It opens directly by 

 the genital pore near the middle of the segment. 



Female: (Also plate XXVII, figure 32.) In tlie ovipositing 

 female the Ovaries are very large, falling all available space in the 

 dorsal and lateral regions. Ihey are attached to the posterior 

 part of the thorax and immediately enlarge to fill the swollen 



TRANS. AM. ENT. SOC, XLIV. 



