N0.215C. SUBFAMILY ALEYRODINAE—QUAINTANCE & BAKER. 439 



0.608 mm. wide at its greatest width; radial sector rather thick, 

 sometimes almost straight and in other specimens with one or 

 two cm-ves; cubitus present only at the very base of the wing, 

 its position, however, being indicated by a hght area; wings mottled 

 and spotted with dark brown, as shown in the figure. This is most 

 prominent in two transverse areas, one near the distal extremity of 

 the wing and the other a httle proximad of the middle. Margin 

 (fig. 12) armed with a series of rather broad teeth, on which minute 

 hairs are situated. Hindwing (fig. 5) 1.088 mm. long and 0.48 mm. 

 wide; vein ahnost straight; color uniform smoky. Abdomen 

 broad and large; ovipositor dark brown, armed with numerous 

 prominent spmes; vasiform orifice (fig. 6) elliptic, transverse, and 

 surrounded by a dark area which extends back to the ovipositor. 

 Operculum somewhat semicircular, about half filling the orifice; 

 Ungula very broad and long, exserted for some distance; both oper- 

 culum and lingula with numerous fine hairs. 



Adult male. — Much smaller than the female, being 0.84 mm. 

 long. Color much the same, but with more of a reddish tint on 

 the abdomen. Antennae (fig. 10) similar to those of the female. 

 Segment I 0.03 mm. long, subcylindric; II 0.045 mm.; Ill 0.08 

 mm.; IV 0.03 mm.; V 0.036 mm., with two smaU distal sensoria; 

 VI 0.02 mm.; VII 0.021 mm., and armed near its distal extremity 

 with a long, spiked sensorium and two circular ones (fig. 14). 

 Segments III to VII strongly imbricated and covered with trans- 

 verse rows of minute hairs. Forewing (fig. 9) straight, with radial 

 sector straight and thick; cubitus not present, though in some 

 specimens there is a faint shading indicating it. Length of wing 

 0.64 mm.; width 0.208 mm.; marking very similar to that of the 

 female, as shown m the figure. Hind wing 0.48 mm. long and 0.24 

 mm. wide; vein straight, uniform dusky in color. Hind tibiae 

 0.35 mm. long; hind tarsi, proximal segment 0.08 mm., distal seg- 

 ment 0.064 mm. Abdomen very long in some specimens as com- 

 pared to the wings and claspers, measuring, exclusive of claspers, 

 0.512 mm. in length. Claspers (fig. 11) 0.144 mm. long, dark brown 

 in color, not acutely pointed at distal extremity, thick and armed 

 with numerous hairs. 



EXPLANATION OF PLATES. 



Plate 32. 



Alcurocanthus bambicsae.—l, insects in place on plant; 2, larva, first stage; 3, ventral 

 pores near margin of larva, first stage; 4, larva, second stage; 5, larva, fourth stage; 

 6, margin of case of fourth-stage larva; 7, pupa case; 8, margin of pupa case; 9, vasi- 

 form orifice of pupa case . (After Peal . ) 



