22 PROCEEDINGS OP THE NATIONAL MUSEUM vol.75 



dianly and posteriorly with a moderately large, pale-brown region 

 (somewhat larger than one of the compound interior prescutal 

 sclerites of mesothorax and metathorax), sagittal line distinct and 

 whitish ; sclerites on the upper side of mesothorax, metathorax, typi- 

 cal abdominal segments and the pygidial shield pale brown; under 

 side of body creamy yellow with light-brown sclerites; legs shining, 

 dark brown. 



Setae moderately long, moderately strong, light brownish and 

 somewhat club-shaped terminally; present in limited number on the 

 back and sides of the larva. 



Head capsule. — With only slight depressions in frons. 



Lahrwni (fig. 32). — Subrectangular, about two and one-half times 

 as wide as long, middle of anterior margin slightly emarginate and 

 anterior corners strongly arcuate. Discal setae moderately long and 

 pointed. Marginal setae minute. 



Mandible (fig. 27). — ^With five claw-shaped teeth; inner margin 

 behind last tooth slightly incurved ; fourth and fifth teeth somewhat 

 fused at bases, fourth tooth much stronger than fifth. Penicillus 

 present ; two short setae externally. 



Maxilla. — ^With lacinia distally pectinate, carrying a row of sub- 

 cylindrical, terminally obtuse, strong setae of uniform and consid- 

 erable length ; galea with about six spinelike setae and a small, cone- 

 shaped tactile appendix. 



Postlahial hand. — Simple, rounded, slightly curved forward in the 

 middle. 



Prothorax (fig. 23). — Prothoracic shield on each side having a 

 large, flat depression with half a dozen round pits in the bottom; 

 five well-developed setae in the anterior margin, one laterally and 

 two posteriorly. Epipleural sclerite large, with two or three setae. 

 The prehypopleural sclerite ( = episternum) and the posthypopleural 

 sclerite (=epimeron) of about the same size, the prehypopleural 

 sclerite somewhat darker near the articulation of the leg, each sclerite 

 with two setae. Eusternal and sternellar sclerites almost fused to 

 one plate, two setae on each side. 



Mesothorax and metathorax (fig. 23). — All the sclerites of moder- 

 ate size ; compound middorsal sclerites separated sagittally by a fine 

 white suture. Prescutal area with interior compound sclerite carry- 

 ing one seta on each side ; exterior sclerite distinct, one seta. Scuto- 

 scutellar area with interior compound sclerite almost identical with 

 interior prescutal, one seta on each side; exterior scuto-scutellar 

 sclerite almost twice as large as exterior prescutal, one seta present. 

 Alar sclerite large, with three setae. Spiracular area chitinized, with 

 one seta. Epipleural area with a moderately large, rounded sclerite, 

 one seta. Prehypopleural and posthypopleural sclerites as in pro- 



