316 



iiessof Mr. H. Caiacciolo, of Port of Spaiu) were mostly dry and in 

 their natural positions upon the leaves, so that we have not been able 

 to trace the entire life history of the species. We have made out sev- 

 eral of the stages, however, which we illustrate herewith. The insects 

 cluster mostly upon the undersides of the leathery leaves and form 

 dense masses along the ribs, the more advanced specimens being fur 

 nished with an abundant waxy secretion giving a general mildewy 

 appearance to the surface, while the upper surface is frequently attacked 

 by a smut fungus Avhich is developed on the honey dew thrown down 

 from the undersides of the leaves above. Cocoons of a species of 

 Chrysopa appear frequently in the masses and two species of lady- 

 birds of the Scymnid group have been found feeding upon the lice. 

 The honey dew attracts numerous ants, and one species which Mr. 

 Caracciolo has sent us has been determined by Mr. Pergande as Preno- 

 lepis longicornis. 



Fig. 41. — Aleurodicus cocois Curt, 

 view ; «, protrasile organ of s 

 h, margin of body of same — n, 



«, egg; h, first larva; c, leg of same; d, intermediate larva, dorsal 

 :me ; /, secretory pore of same ; g, intermediate larva, ventral view ; 

 i, d, g, enlarged: c, f , /, h, stiU more enlarged (original). 



Aleurodicus oocois Curtis. 



The Egg (Fig. 41rt ) . — We know the egg only from specimens taken from the bodies of 

 gravid females. Length, 0.29'""' ; greatest width, O-llmra j length of pedicel, 0.064'""'. 

 From these measurements it will be seen that the egg is broader in proportion to its 

 length than that of Aleyrode-s citri. The pedicel, instead of arising from the base of 

 the egg, has its origin on the side, somewhat above the base, as shown at Fig. 41rt. 

 No sculpturing is observable. 



Newly-hatched Larva— first stage (Fig. iU). — What we assume Irom its size to be the 

 first stage has been sparingly found in a more or less dried-up condition upon the 

 leaves of guava received. It is 0.41""" long and 0.19""'" wide, regiilarly elliptical, 

 flattened, and smooth. Twelve hairs of medium length protrude from each side. 

 Antennae short, apparently five-jointed, joints subequal. Rostrum, one-jointed, 

 arising from a point halfway between the middle of the body and the anterior 

 extremity. The dorsal-anal pore is distinct, and the long conical organ protrudes. 



Larva — intermediate Stage (Fig. Hd, g). — A stage intermediate between the newly- 

 hatched larva and that which seems full grown has been found and carefully studied. 

 It is flattened, of short oval form. 1.02'"'" long and 0.84'"'" wide. The legs are plain, and 



