138 AN UNDESCRIBED LARVA 



They are not transversely wrinkled, as is the remaining 

 part of the body. 



NERVOUS SYSTEM. 



A small frontal ganglion is present. The cerebral mass 

 lies outside the developed epieranium, in the segment next 

 following. It consists of two almost completely separate, 

 fusiform ganglia. In twenty-two transections of a mass, 

 only one, the tenth, showed the ganglia fused across the 

 middle line. 



The subcesophageal ganglia are much smaller, and lie 

 opposite the anterior half of the brain. In the same set 

 of twenty-two sections the subcesophageal mass appeared 

 in eleven sections, beginning in the second, and ending in 

 the twelfth. 



Immediately following the suboesophageal mass are four 

 closely approximated masses, and at a short distance pos- 

 terior to the last of these is still another, thus making with 

 the suboesophageal, six masses, all within the anterior 

 fourth of the body. The remaining five masses of the 

 ventral chain are widely separated in the posterior three- 

 fourths of the body, the last being nearly opposite the 

 point at which the Malpighian tubules enter the intestine. 



DIGESTIVE SYSTEM. 



The oesophagus is very long and slender. In the young- 

 est example seen it is nearly half the length of the body ; 

 apparently it shortens somewhat with age, but in all cases 

 is very much longer than in the other larvae compared. 

 It opens into a capacious ventriculus which appears to be 

 folded on itself, and this opens in turn into a short intes- 

 tine. 



Malpighian tubules of a dark brown color are present, 

 and extend forward upon the ventriculus. Four tubules 

 appear to enter the intestine separately. 



