36 PROCEEDINGS OF THE NATIONAL MUSEUM voi,. 75- 



of head capsule, epistoma included, shining dark brown; sagittal 

 carina of frons indicated by a thin black line. Body with the skin 

 creamy white, the thoracic and pygidial shield and the rest of the 

 sclerites shining yellow ^^; legs shining brownish. 



Setae moderately long, cream colored to light brown, pointed, pres- 

 ent in rather limited number on somewhat convex or flat sclerites. 



Head capsule (fig. 43). — With frons reaching far back and median 

 epicranial suture short; ratio between length of frontal carina and 

 that of epicranial suture approximately as 4 to 1. Setae fairly 

 long and pointed. 



Labi'um, (fig. 43). — -With free margin arcuate, medianly incurved.. 



Mandible (fig. 54). — With four \vell-developed, more or less dis- 

 tinctly serrated teeth; first tooth rudimentary. Penicillus present, 

 two well-developed setae on the bai-k. 



Maxilla (fig. 71). — Lacinia and galea not appearing (on the two 

 slides prepared) as distinctly separated; setae rather short, thin,, 

 and pointed; cone-shaped appendix present. 



Postlabial hand. — Narrow, forming a simple arch. 



Frothorax (fig. 14). — Shield with discal part smooth and llatly 

 convex, marginal parts thick, slightly elevated and somewhat pit- 

 ted; sagittal line thin and whitish colored, but owing to the light 

 color of the entire shield not distinct. Setae rather short, arranged 

 in one or a few^ rows in the marginal region, one or two setae on 

 each side in the discal part. Epipleural area small with a rounded 

 sclerite carrying a single seta. Prehypopleural area ( = episternum) 

 with a well developed, somewhat convex sclerite, no seta; po.st- 

 hypopleural area (=epimeron) with a similar sclerite but carrying 

 one seta. Eusternum with a narrow transverse, unpaired sclerite 

 carrying two setae on each side. Sternellar sclerites fused together 

 in the middle line to a small, square, narrow plate, probably in- 

 cluding elements of the eusternal sclerite; two setae on each side, 

 one in front of the other. Poststernellar area (=spinisternuuu 

 Crampton) triangular, distinct, and somewhat chitinized. 



Mesoth&rax and metathorax (fig. 14). — Interior prescutal sclerite 

 almost fused with the interior prescutal sclerite of the opposite side^ 

 two setae on each; exterior prescutal sclerite equal in size to the 

 interior one, three setae present. Interior and exterior scuto-scu- 

 tellar sclerites in form, size, and the number of their setae equal to 

 the interior and exterior prescutal sclerites. Alar sclerite larger, 

 with about five setae. Spiracular area of mesothorax pushed for- 

 ward and located below the prothoracic shield; spiracular area of 

 metathorax in normal position, one seta present. Epipleural sclerite 

 with one seta. Prehypopleural sclerite ( = episternum) somewhat 



'^ In newly hatfhod larva the number of sclerites and setae is similar to tlint of the 

 ifintur«i larvae, but the chitinized parts are brown and the setae proportionately longer. 



