116 Journal New York Entomological Society, [^'o^- xxv. 



and a pair of long hairs arranged along the posterior margin of the 

 segment near its base. The femur is somewhat stouter than the tibia 

 and nearly free from spines, though possessing a few slender hairs 

 on its anterior margin. (See fig. 4.) 



Second Instar. 



Sice. — General measurements : 



Mm. 



Width of head 75 



Greatest abdominal width 90 



Length of body 1.63 to 1.78 



Specific measurements : 



Femur. Tibia. Tarsus. Claw. 



Prothoracic leg .291 



Mesothoracic leg 249 .333 .333 



Metathoracic leg 457 .400 .625 



Color. — The general color is arranged in a more distinct pattern 

 than that of the first instar, though not as pronounced as in the next 

 instar. The abdomen is crossed by dark lines, following the point of 

 union of the segments. This banding conspicuously marks the second 

 from the first instar and, in a petrie containing a number, at once 

 distinguished a moulted form from those still in their first stage. 



Structural Details. — Much as in previous instar. The lateral 

 spines are now arranged in a different way. Long spines alternating 

 with short ones, five or more to each segment. 



The rear margin of the mesothorax is now indicated by a line 

 arcuated as shown in the drawing. (See PI. IX, fig. 5.) 



In specimens about to transform to third instar, the hairs fringing 

 the thorax in the next stage are visible beneath the covering. 



Third Instar. 



Sice. — General measurements : 



Mm. 



Width of head i 



Greatest abdominal width 1.25 



Length of body 2.3 



Specific measurements : 



Femur. Tibia. Tarsus. 



Prothoracic leg .372 .49S 



Mesothoracic leg 1.16 .526 .498 



Metathoracic leg 66 .623 .919 



