76 CLASSIFICATION OF THE ALEYRODID^. 



Segments 3 to 7 show usual corrugatious ; segmeut 7 with constriction on 

 distal half at which point is borne a distinct bristle. 



Habitat. — Type material collected at Havana and Santiago de las Vegas, 

 Cuba, in November, 1010, by the writer. 



Food plant. — (iuava, Pstidiuni guajava radii. 



Type. — TyiM? material in collection of the U. S. D. A.. Bureau of Entomology, 

 and in that of the writer. 



This species is I'eally distingnishetl by its iridescent wing on which the spots 

 described stand out prominently. It differs superficially from iridescens in 

 having a siK)t on the hind wings and in color of pupa case; from minima 

 it differs in having no appreciable clouding of wings other than the spots 

 described, in shape and location of the spots, and in the pupa case having 

 but five instead of seven pairs of wax iwres. The darkened portions of the 

 vasiform orifice appear as a dark six)t on the untreated adult. In crawling 

 about the leaf, the female leaves behind a line of tine fluffy waxen secretion 

 rubbed from a tuft of the same develoiiing on the underside of her abdomen. 

 Frequently her path can be distinctly followed by the aid of these lines of 

 secretions. In mating, the sexes head in the opposite direction, and in this 

 respect differ from those species of Aleyrodcs that have come under the observa- 

 tion of the writer. 



This species becomes quite abundant on the guava at times, and when not 

 parasitized becomes a nuisance. In November, 1910, it was causing noticeable 

 blackening of the foliage at Santiago de las Vegas. The species is, however, 

 heavily parasitized by a hymenopterous parasite and the red fungus {Ascher- 

 sonia alcyrodis) which the writer found generally present on affected leaves. 

 Prof. Patricio Cardin, for whom this species is named, sent the writer specimens 

 in May, 1911, over 90% of which had been parasitized by a hymenopterous 

 parasite. This is the species of white fly figured by Cook and Home as an 

 undetermined aleyrodid on guava (PL XV, fig. 41, Bull. 9. Estacion Central 

 Agronomica de Cuba), and beyond doubt is that referred to in the Primer 

 Informe Anual of the same station as " Guagua a mosca blanca de la guayabo." 

 Cook and Home (1. c, p 31), say that Alcyrodes hotoardi is the species referred 

 to, but in this they are apparently mistaken, as the writer has not found 

 howardi except very rarely on guava. While howardi was generally present 

 on orange trees close by, this species was found only on guava. 



DESCRIPTIVE REMARKS. 



Pupa case. — Form elongate oval; length 0.896 mm.; width 0.616 

 mm. Dorsum with five pairs of large compound pores with reduced 

 spinnerets (PI. XXVII, fig. 3). Scattered on the surface of the 

 dorsum are also found a number of minute clear areas, resembling 

 pores. Dorsal margin entire; just within it all around is a row of 

 large simple wax pores (PI. XXVII, fig. 4). On the caudal ex- 

 tremity, opposite the two caudal compound pores, is a pair of large 

 hairs. Along the margin all around and apparently on the ventral 

 surface is a row of small spines, there being about nine to a side. 

 A pair of small setae is inserted just cephalad of the vasiform orifice. 

 This orifice is subcordate in outline, with the cephalic margin straight. 

 The operculum is almost rectangular in shape, with the caudal mar- 

 gin wavy. The lingula is somewhat spatulate, slightly exserted, and 

 armed with four long hairs. Both operculum and lingula are setose. 



