17G REPORT UNITED STATES ENTOMOLOGICAL COMMISSION. 
being, when distended, ;i quarter of an inch thick; while in A. purpuras- 
cens it is a little shorter, only extending into the base of the abdomen. 
At its junction with the proventriculus or fore stomach (Fig. 5, pe) six 
toothed, chitinous platesor horny ridges radiate from the opening into the 
proventriculus, being the continuations of the six principal denticulate 
ridges in the proventricle. The latter division of the digestive canal is 
small, oval, rounded, no longer than thick, and provided on the inner sur- 
face with six rows of large, sharp, finely serrate, triangular, autero-poste- 
riorly compressed teeth, with a small spine on each side at the base, while 
on each side adjoining are secondary small conical teeth ; there are about 
fifteen larger teeth, with a row of fifteen lateral onesoneach side,making 
45 in each set or series, so that there are 270 teeth in all. Each of the 
six series or rows is separated by a long, narrow, linear chitinous band. 
The smaller lateral teeth are not antero-posteriorlv compressed, but are 
rounded, and stand separate from each other. 
At the beginning of the true stomach (chyle-stomach or ventricle are 
appended two eoecal appendages, one above and one below, and much 
broader than the narrow stomach itself, each forming a flattened docked 
flap, with about 12 longitudinal folds, especially marked on the sides 
next to the crop. The stomach is slender, ami without diminishing in 
thickness passes backward in the abdomen, then making one turn be- 
fore terminating, the end being situated where the numerous urinary 
tubes (Fig. 5, ur) originate. These long, fine, thread-like tubes are 
very numerous and are over an inch long, twisting about the alimentary 
canal, and, in many cases, are firmly attached by their ends to the free 
ends of the two ccecal lobes of the stomach. 
The stomach is succeeded by the intestine, which is divided into a 
short ileum and a colon. The former is but little smaller in front than 
the stomach, but becoming smaller posteriorly ; it makes a deep S-shaped 
bend. The colon is smaller than the ileum. The long, thick rectum is 
situated directly under the tegument of the back of the end of the 
abdomen, the anal opening being but little smaller than the diameter of 
the rectum. The rectal glands are but sbghtly developed compared 
with those of the locust. The salivary glands (Fig. 5, sg) are in loose 
botryoidal masses somewhat as in the locust (Caloptenus femur -rubrum). 
They discharge the salivary fluid through the salivary ducts (Fig. 5, s r') 
into the base of the mouth near the tongue (Fig. 5, t). 
The ovaries are two in number, situated one on each side of the turn 
of the stomach. Each ovary forms a triangular conical mass, the base 
being broad. They are each composed of about 40 long, slender ovarian 
tubes, each tube being accompanied by a tracheal branch. These 
ovarian tubes unite to form the secondary oviducts, which are moder- 
ately long and unite directly under the lost ganglion to form the main 
oviduct which ends in the copulatory pouch (Fig. 5, v). 
The nervous system is in its general disposition like that figured and 
described in our account of Caloptenus. Besides the brain and subeso- 
