INSECTS. 
Fic. 111.—Foot of house-fly, show- 
ing the pads by which it clings. 
food passes by the cesopha- 
gus, 4, into a membranous 
stomach called the crop, ¢, 
and thence, in the biting in- 
Fic. 112,.—Longitudinal and verti- 
cal section of a female cockroach 
(Blatia). 1 to XX, somite of 
the body; 1 to 11, somite of 
the abdomen; 4, antenna; /2, 
labrum; a2, mouth; 4, cesopha- 
gus; ¢, crop; @, proventriculus, 
or second stomach ; 4, intestine ; 
z, rectum; 4, salivary gland; 2, 
salivary receptacle. By an error, 
the duct is made to terminate 
above instead of beneath the 
lingua. A, position of heart ; 
m, cerebral ganglia; V, thoracic 
ganglia ; 7, chyle stomach. (Af- 
ter Huxley.) 
Fic, 112. 
