May, '09] ENTOMOLOGICAL NEWS. 215 



MEASUREMENTS. 



c? ? 



Length of body 88. mm. 77. mm. 



Length of pronotum 3.2 " 3.5 " 



Length of mesonotum 20. " 17.5 " 



Length of metanotum 20. " 15. " 



(Including median segment.) 



Length of cephalic femur 24. " 20. " 



Length of median femur iS.S " 15.2 " 



Length of caudal femur 24.5 " 19. " 



The types are the only specimens of this interesting species 

 which have been seen by the author. 



Description of a Mexican Aleyrodes. 



BY T. D. A. COCKERELL. 



In Entomological News, 1903, I published a short note on 

 Aleyrodes vitrinellus, a new species from Mexico. The full 

 description was sent to Professor Herrera to publish in Mex- 

 ico, but it was apparently mislaid or lost, as it has never ap- 

 peared. It therefore seems necessary to give the particulars 

 here, the original short note being inadequate. The species is 

 of some importance just now, owing to the great attention 

 being given to the Aleyrodidae of Citrus. 



Imago. Yellow; eyes undivided; a bright orange stripe (apparently 

 internal) extends from the posterior part of the thorax to about the 

 middle of the abdomen. 



Pupa. Pale yellowish or colorless, very much like that of A. ftori- 

 densis, but larger (900 ^. long; floridensis is not over 700 /*.), with- 

 out the dark markings, and with a longer fringe, with more rods 

 united, so that it seems coarser ; the rods are straight. Surface of 

 pupa strongly granular; margin double, one edge crenulated and the 

 othrr (upper) one crowded with regular short tooth-like pointed pro- 

 jections; this is a condition very similar to that of A floridensis. 

 There are more or less obvious dorsal and sub-dorsal longitudinal 

 series of low tubercles. Margin with long radiating glass-like rods. 

 No dorsal secretion. 



Vasiform orifice about 54 ^. long, broad-cordiform, the apex (pos- 

 terior end) very faintly notched; operculum very broad, the apical 

 margin gently convex; lingua broad spatulate, the apical portion rather 

 obscurely crenulate. In all this there is a general resemblance to 

 these parts in A. variabilis, but in A. vitrinellus the vasiform orifice 

 is much broader, with the apical notch very much fainter, and the 

 operculum is very much less pointed, while the lingua is not so 

 strongly crenulated. 



Hab. Garden of Netzahualcoyotl, Texcoco, Mexico (A. L. 

 Herrera, No. 700). ( >n the under side of leaves which appear 

 to be those of orange, with much black fungus. 



