98 Annals Entomological Society of America [Vol. XII, 



with few hairs. OcelH six, on a raised portion back of the antennae. 

 Antennae four-jointed, the first and fourth joint about equally long; the 

 second joint two-thirds the length of the first; the third joint slightly 

 longer than first, with a crook above the middle. Two or three bristles 

 originate from this outward crook or elbow, and one from the inner 

 side. Fourth, or apical joint, with four bristles at the tip. 



Mandibles long curved, with a strong tooth below the middle, 

 directed inward' and slightly downward. A small bunch of hairs near 

 the inner base of mandibles. 



Maxillae with a long stout basal joint, bearing numerous hairs, 

 especially on the inner and upper surface. Outer palpus four-jointed; 

 first joint as wide as long, second joint somewhat more slender and at 

 least twice as long; third joint slender and a little shorter than second; 

 fourth joint as long as first, but very slender. Inner palpus two-jointed, 

 the basal joint stouter and a little longer than second. Just inside 

 the inner palpus is another small joint tipped with a bristle. 



Mentum about as wide as long. Anterior margin produced to a 

 point bearing two hairs. Palpus with basal joint little longer than 

 broad; second joint little longer than first and tapering greatly. 



Prothorax narrowing anteriorly, a third wider than long. Surface 

 finely punctate. 



Meso- and Metathorax each twice as wide as long. 



Abdomen of nine true segments, gradually tapering posteriorly. 

 The ninth segment bears the anal tube and the two posterior processes. 

 These processes each bear five long stout hairs, three about equidistant 

 along the process and two at the tip. 



Legs long with stout hairs and two claws at the tip. 



Measurements of Cast Skin. Length from tip of mandibles to tip 

 of caudal processes, 7.43 mm.; greatest width across thorax, 1.26 mm. 



SECOND AND THIRD INSTARS. 



. The second and third instar larvse do not differ greatly in structure 

 from the first except in size and proportions. The first instar is more 

 spindle shaped. The body of the second and third instar is more 

 flattened. 



SECOND INSTAR LARVA. 

 (Plate VI, Fig. 7). 



The second instar larva differs from the first in the following points. 



AntenncB. First and third joint of equal length. Second and fourth 

 joint subequal, each a little shorter than first and third joint. 



Palpi of mentum with basal joint twice as long as broad; second joint 

 as long as first. 



Prothorax about twice as wide as long. 



Meso- and Metathorax each more than twice as wide as long. 



Caudal processes with four long hairs; one about half way back, 

 another three-quarters back, and two at the tip. 



Measurements of Cast Skin. Length from tip of mandibles to tip of 

 caudal processes, 10.28 mm.; greatest width across thorax, 2.25 mm. 



