16 Annals Entomological Society of America [Vol. XII, 



rest of the dorsal integument in the cast skin, showing that 

 ecdysis must be accomplished by the formation of a dorsal 

 rent behind the head. The thoracic and abdominal plates, 

 except the last three are widely separated by the enormously 

 distended membrane, so that they appear as widely separated 

 bars like those of a much swollen termite queen. The first or 

 prothoracic plate is broader than the others and crescentic, 

 being deeply emarginate in front. The three following are 

 narrower and but slightly curved; the following become gradu- 

 ally smaller to the minute apical one. At each side of each 

 plate is a more or less triangular, paler extension, separated 

 by a fine clear line; these probably represent pleural plates; 

 they are similar to those of Perilampus in having the tip pro- 

 longed into a long bristle-shaped point, but the posterior edge 

 bears several short teeth instead of bristles. Between the 

 plates and on the ventral surface, the membrane bears some 

 bristly hairs as in Perilampus, but the arrangement of these 

 cannot be made out clearly in the specimen. I find no trace 

 of the caudal bristles present in Perilampus, but these may 

 easily have been lost in ecdysis. 



Larva. Full-grown, length 12 mm. There is a single 

 larva, evidently full-grown and ready to molt into the pupal 

 condition as the appendages of the pupa are to be seen through 

 the skin. The body is rather stout (Plate I, Fig. 1) nearly 

 straight and broadest near the posterior end. At the anterior 

 end there is a large vesicular swelling which extends ventrally, 

 behind it on the ventral side lies another smaller swelling 

 which evidently represents the head and mouthparts, although 

 no definite structures can be made out. Dorsally, and to a less 

 degree on the sides and below, the surface of the body is undu- 

 lating, indicating eleven segments, including the anterior 

 vesicle previously referred to. Of these segments the three 

 anterior ones (thoracic) are larger than the basal abdominal 

 ones, although the last several abdominal segments increase in 

 size till the sixth is the largest body segment; beyond the 

 segments become rapidly smaller and bent down ventrally; 

 finally at the apex on the ventral side of the body is a minute 

 tubercle which evidently is a twelfth segment. The surface 

 of the whole body is clothed with minute, colorless, sparsely 

 placed hairs which undoubtedly function as exudate organs. 



