NO, 2156. SUBFAMILY ALEYRODINAE—QUAINTANCE d BAKER. 419 



which broadens as it reaches the subdorsal region. Vasiform orifice 

 (fig. 6) broadly subcordate with the cephalic margin almost straight; 

 rim of the orifice thick and its inner caudal and lateral margin armed 

 with about 12 distinct teeth. Cephahc margin armed with a pecuhar 

 thickened area which clasps the orifice at the sides like the cup of an 

 acorn; operculum similar in shape to the orifice and nearly fiUing it, 

 obscuring the lingula; latero-caudad are two ridges which approach 

 one another, suggesting the caudal channel present in some other 

 forms. 



Adults. — Unknown. 



Type. — Cat. No. 19049, U.S.N.M. Described from pupa cases in 

 balsam mounts. 



DIALEURODES (DIALEURODES) TRICOLOR, new species. 



Plate 66, figs. 8-13. 



Foliage of a myrtaceous plant infested with this insect and collected 

 at Eubato, Brazil, was received by the Bureau of Entomology in 

 July, 1898, from Dr. F. Noack. A balsam slide mount containing 

 five pupae is aU of this material which we now have. The species, 

 however, is quite distinct and is easily recognizable. 



Pupa case (fig. 8). — Under reflected light the case appears brown- 

 ish in color and is apparently void of waxy secretion. Examined 

 under the microscope, the coloring is found to be about as follows: 

 All around margm is a rather narrow border, the inner margin 

 showmg an interrupted line of pale yellow. The submarginal area 

 is lemon yellow and the dorsal disk orange in color. Surromiding the 

 dorsal disk is an irregular band of dark brown coveruig the vasiform 

 orifice and extendmg cephalad to the transparent marginal rim, 

 where it spreads out, fonnmg a broad arrow-shaped figure (fig. 8). 

 The shape is subcircular, margin flattened, and dorsum somewhat con- 

 vex; size 1.28 by 1.088 mm. Margm (fig. 9) mmutely incised; the 

 sutures between wax tubes are quite distinct, extendmg mesad to the 

 yellow subdorsal area. Denn thickly marked with granular spots, 

 very evident under reflected light. Transparent marginal area with 

 rather numerous, large, more or less circular markings. This rim is 

 very generally sprinkled with minute lighter colored dots. On 

 inner margin of transparent margmal rim is an interrupted row aU 

 around covered by rather prominent subcircular brown spots. Thor- 

 acic segments distinct; abdominal segments moderately so. Tra- 

 cheal folds evident toward margin of case, ending just within margin 

 in the transparent rim or band. The pore (fig. 10) is bordered all 

 around with brownish. There appear to be no fimbriae or teeth 

 around pore orifice, but the derm is marked with closely set radiating 

 lines. 



