280 PROCEEDINGS OF THE ACADEMY OF '[May, 



often has a fold which simulates a branch. The snbmedian vein 

 has usually been considered a branch of the median, but it appears 

 to have in every case a separate origin. The pupa of Ahurydicus 

 is rather easily recognized by its large lingua, and the nearly uni- 

 versal possession of very large secretory pores along the sides of the 

 abdomen. The margin of the pupa is often provided with hairs at 

 rather distant intervals, 



1. cocois (Curtis), 7. ornatm Ckll., fig. 1. 



2. a7ionce Morgan. 8. pidvinatus (Mask,). 



3. d ug esii CkW. 9. altissimm (Cliiaint.). 



4. iridescens Ck]]. 10. persece ((^immt.). 



5. mira6i7is (Ckll.), figs. 3, 4. 11. holmesii (Musk.). 



6. minimus Quaint. 12. jamaiceiisis n. sp., fig. 2. 



Aleurodicus jamaicemis was collected by the writer at Kingston, 

 Jamaica, in 1893. The pupa is small (hardly 1^ mm. long), with 

 vertical walls, margin resembling that of j^^f-^vinatus ; color bright 

 yellow, with a brownish dorsal cloud, and a diamond-shaped black 

 patch just anterior to the vasiform orifice. Other characters are 

 shown in fig. 2. 



Subg. DIALEURODICUS n, subg. 



Pupa without any profuse secretion or wax rods ; no large secre- 

 tory pores; adult with short spotted wings, the branch of the 

 median vein more basal than usual. Type Aleurodicus cockerelli 

 Quaintance, from Brazil. 



ALEYRODES Latreille. 



Aleyrodes Latreille, Hist. Nat. Crustaces et Insectes, Vol. XII 

 (1804), p. Ml. 



Tyjje A. proletella (L. ). 



The species average smaller than Aleurodicus and the median 

 vein is not forked. The pupje often have a lateral fringe of waxy 

 rods or ribbons. As at present understood, the genus is cosmo- 

 politan. 



(1) Pal.earctic Species. 



