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NO. 2156. SUBFAMILY ALEYRODINAE—QUAINTANCE d BAKER. 413 



particular easily separates the two species, and this stage was well 

 described and figured by Morgan. It seems unnecessary, therefore, 

 to discard Morgan's name for nuhijera, which was proposed by Berger 

 in 1909. In proposing this name Dr. Berger says "the reticulate 

 egg was figured in 1893 by H. A. Morgan," but he makes no mention 

 of the fact that descriptions of the pupa case and adults were also 

 given. Morrill and Back in following Berger state that the descrip- 

 tion of the pupa and adult given at the same time were "evidently 

 * * * based on specimens of A. citri.^' There seems, however, 

 nothing in Morgan's description which would not be true for citrijolii, 

 and as the egg definitely fixes the identity of the species, Morgan's 

 name should be retained. Dialeurodes citrijolii is known from the 

 following States: Florida, California, Louisiana, Mississippi, and North 

 Carolina. No specimens of this species were taken by Mr. R. S. 

 Woglum in the Orient, though it will probably be found to be native 

 to that region. It is also known from Mexico and Cuba. 



Egg (fig. 9) . — The eggs are laid without any definite arrangement 

 upon the under surface of the leaf. The egg is elliptical-elongate in 

 shape, and in hatching the opening does not extend more than half 

 way down the egg. This slit remains open, being different in this 

 respect from the egg of D. citri. In size it is about 0.256 by 0.088 

 mm., and when first laid it is cream color, later changing to a slate 

 or bluish black. It is pruinose and covered with a waxy coat in the 

 form of hexagonal meshes (fig. 10). This may become dissolved in 

 preparing mounts and is often broken from the egg in the dry state. 

 This waxy covering and the dark color serve easily to separate the 

 egg of citrijolii from that of citri. The stalk is attached to the 

 base of the egg, is pale yellowish in color, and usually about as long as 

 the egg is wide, though in some cases it is much longer. 



Larva, Jirst instar.— Color light-yellowish green, sometimes whitish, 

 due to slight particles of wax on the ventral surface. At first there 

 is neither lateral nor dorsal secretion, but soon an irregular waxy 

 fringe, as wide as the length of the marginal hairs, is secreted. Shape 

 elliptical; size 0.3 by 0.2 mm.; margin almost entire and armed with 

 18 pairs of hairlike bristles. Of these the first and third caudal 

 pairs are much longer than the others, as is also the second cephalic 

 pair. The antennae and feet are similar to those of D. citri. 



Pupa case.— On the leaf the pupa cases are pale yellowish in color, 

 rather white when the adult has emerged, and lack both dorsal and 

 lateral secretion. They are much evener in shape than the cases 

 of D. citri, being elliptical. They are extremely flat and thin and in 

 this respect also differ from citri. In the character of the surface 

 there is little difference between the two species, as citrijolii possesses 

 the same almost smooth condition of the median portion of the 

 dorsal disk and the same striations on the submarginal area. The 



