414 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



striations, however, seem to be a little more regular in most speci- 

 mens of citrifolii than in those of citri and light is not so much reflected 

 from the surface. The cases collapse when the adult has emerged. 

 Balsam mounts by transmitted light show the cases yellowish in color, 

 almost transparent; size 1.76 by 1.32 mm. (fig. 1). The margin (fig. 

 12) is very minutely serrate, and extending inward from it is a closely 

 set series of narrow pointed wax tubes, which broaden as they extend 

 mesad and collectively form a marginal band all around. The dorsal 

 derm is closely set with irregular more or less circular markings 

 which seem to be arranged more or less concentrically from the me- 

 dian dorsal area to the margin. On the submarginal area the thoracic 

 and caudal tracheal folds are distinct, the openings of the thoracic 

 pair (fig. 2) being near the margin and armed with six or eight 

 rather distinct fimbriae. The caudal fold (fig. 3) is marked with 

 numerous large and small irregular reticulations with differentiated 

 centers. These are much larger and more irregular in size than the 

 minute dots present within the folds of D. citri. The thoracic 

 tracheal folds seem to lack these markings. The vasiform orifice 

 (fig. 4) is subcordate, 0.051 mm. wide, and 0.048 mm. long. The 

 inner caudal margin is armed with a rather large number of fairly 

 distinct teeth directed cephalad; operculum similar in shape, with 

 the anterior margin straight and the sides slightly compressed. It 

 almost entirely fills the orifice. On each side of the vasiform orifice 

 a minute seta is situated and a pair is present on the latero-caudal 

 and cephalic margin. 



Adult female. — Color very similar to that of D. citri, with the excep- 

 tion of a dusky spot on the distal extremity of the forewing, this 

 being one of the characteristics by means of which it is easUy dis- 

 tinguished. Length from vertex to tip of ovipositor 1.28 mm.; 

 color in balsam mounts yellow, shaded with brown; forewing when 

 mounted almost transparent with the exception of the shaded area 

 before mentioned; venation similar to that of citri; size of the fore- 

 wing 1.2 by 0.64 mm.; legs yellow in color; hind femora 0.304 mm.; 

 hind tibia 0.432 mm.; armed with a longitudinal row of about 12 

 spines, with another row of similar spines placed about the same 

 distance apart as those of the first row, and with still a third row of 

 smaller spines placed very close together. Hind tarsus with the 

 proximal segment 0.126 mm. long and armed with a longitudinal 

 row of four spines, of which the distal one is the largest (fig. 13). 

 Foot with claws not greatly curved and with the paronychium rather 

 broad (fig. 14). 



Antennae (fig. 5) of seven segments. Segment I subglobose; II 

 subpyriform, 0.06 mm. long and armed with a few prominent spinec; 

 III subcylindric, somewhat tapering distad and proximad, 0.126 

 mm. long, armed with 25 or 30 very fine annular sensoria, and near 



