32 PEOCEEDINGS OF THE NATIONAL, MUSEUM vol.75 



the skin, the thoracic and the pygidial shields, and the rest of the 

 sclerites blackish brown, on the under side greenish gray; imme- 

 diately after a molt the color of the larva is bright yellowish brown; 

 legs shining black.^^ 



Setae long, about half the length of a normal segment, creamy 

 white, slightly capitate, present in considerable numbers, and radiat- 

 ing in all directions from conical elevations of most sclerites on the 

 upper side of the body. 



Head capsule (fig. 42). — With middle of frons slightly depressed 

 transversely; setae pointed, either moderately long or long. 



Lahru77i (fig. 42). — Having an arcuate free margin with a small 

 but relatively deep emargination in the middle; exterior discal seta 

 on each side pointed and as long as the width of labrum, interior 

 discal seta about half as long, marginal setae short and fine. 



Mandible (fig. 53). — Provided with five teeth; first rather short 

 and thin; second, third, and fourth larger and provided with ser- 

 rated edges ; fifth, well developed, broad and pointed but not serrated, 

 appearing as a direct anterior prolongation of the inner edge of 

 the mandible. Penicillus absent. Two long seta on the back and 

 a small sensory ring. 



Maxilla (fig. 69). — Lacinia distally with a row of five, strong, 

 lanceolate setae. Galea terminally chitinized, carrying about half a 

 dozen setae similar to those of lacinia but irregularly arranged and 

 with a cone-shaped tactile organ between them. 



Postlahial hand (fig. 70). — Semicircular, medianly slightly bent 

 forward and enlarged. 



Prothorax (fig. 10). — Shield with discal part transversely de- 

 pressed and marginal parts thick and elevated ; sagittal line present, 

 whitish, and slightly enlarged in the middle. Numerous long setae 

 inserted in two or more rows in the whole marginal region ; inside of 

 this only a few present. Epipleural area with a large rounded 

 sclerite carrying about 10 moderately long setae radiating in all 

 directions. Prehypopleural sclerite ( = episternum) somewhat pro- 

 tuberant, with about half a dozen setae; posthypopleural sclerite 

 (=epimeron) also somewhat protuberant, carrying about three setae. 

 Eusternal unpaired sclerite and the two sternellar sclerites fused into 

 a single trapezoidal, often medioposterity split, plate with three 

 or four short setae on each side. 



Mesothorax and metathorax (fig. 10). — Interior prescutal sclerite 

 distinct, not fused with the corresponding sclerite of the opposite 

 side of the body, arising into a well-developed conical tubercle about 



" Newly hatched larva is very similar to the mature, but somewhat lighter brown, 

 with proportionately longer hairp, and without distinct conical elevations, from any of 

 the sclerites. 



