436 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 51. 



DIALEURODES (DIALEUROPLATA) TOWNSENDI, new species. 



Plate 73, figs. 5-9. 



Specimens of this species are in the collection of the Bureau of 

 Entomology from Lucerna, Tayabas, PhiUppine Islands, and were 

 collected by C. H. T. Townsend on April 24, 1904. They were for- 

 warded to the Bureau by T. D. A. Cockerell. The host is stated to 

 be a "fern." 



Egg (fig. 5). — Size 0.144 by 0.112 mm.; oval in shape with a 

 short, curved stalk. Surface rugose and marked with peculiar circular 

 areas giving it a very beautiful appearance. This egg sculpturing is 

 different from that of any other in the family so far observed. 



Pupa case (fig. 6).— Size 1.39 by 1.12 mm.; shape oval, flat, 

 with a somewhat distinct median ridge; color yellowish brown with 

 the median ridge dark brown. All about the submarginal area of 

 the case and longitudinally along either side of the median ridge 

 there are a large number of small transparent pores. The abdominal 

 segments are well marked off, and the sutures separating them unite 

 to form a distinct rhachis. A distinct suture from the middle of 

 each segment of the rhachis extends across the dorsal disk. The 

 margin is divided by a large number of fine lines extending a short 

 distance mesad. The vasiform orifice is broadly subcordate in out- 

 line and is almost completely filled by the operculmn, which is setose 

 on its distal extremity (fig. 7). Cephalad of the orifice there is a 

 pair of minute setae and caudad of it the integument is thrown into a 

 large nmnber of fine transverse ridges. These merge into elongate 

 polygonal markings which extend to the caudal pore along the tra- 

 cheal fold (fig. 8.) The pores of the thoracic tracheal folds are 

 small and irregularly lobed (fig. 9), and mesad of each is a large pyri- 

 form structure, the interior of which is divided into a number of areas. 

 The cephalic margin of case is armed with a pair of small setae. 



On the leaf there appears no waxy secretion, the insects showing 

 as yellowish or brownish disks. 



Adults. — Unknown. 



Type. — Cat. No. 19060, U.S.N.M. Described from pupa cases and 

 eggs in balsam mounts and dry upon the leaf. 



Genus NEOMASI^ELLIA Quaintance and Baker. 



Neomaskellia Quaintance and Baker, Tech. Ser. 27, pt. 1, Bur. Ent. U. S. Dept. 

 Agric, 1913, p. 91. 



NeomaslceTlia was erected by the writers to include an aleyrodid 

 found in the Maskell collection of Aleyrodidae which presents numer- 

 ous points of difference from other groups in the family, as will be 

 noted from the generic diagnosis. Further study of the material in 

 the collection of the Bureau of Entomology permits us to add another 



