616 REVISTA CHILENA DE HISTORIA NATI RAL 



II. Dorsum dark biowu to bhickish, withieticul- 



atious on its surface . . . : tessellatíts 



Dorsum light yellow, surface witliout reticula- 



tions, but with scattered simple pores cochereU'ú 



Diadiciileuros cockerellii (Quaintance) (Lára. LXIX, J-L) 



Aleurodicus cockerellii Quaintance, Tech. Series 8. 

 Bur. Eut., U. 8. Dept. Agr., p. 45 (1900). 



iJialeurodicHS cockereUii Quaintance and Baker, Tech. 

 Ser. 27, pt. 1, Bur. Ent., F. S. Dept. Agr., p. 26 (1913). 



We have not seen this species iu nature but it has 

 been described by Mr. Adolph Hempel as :<I)orsum cover- 

 ed Avith a dense, thick mass of white secretion, arranged 

 iu a marginal fringe, aud a submarginal oval ring. Habit- 

 at, Campiñas, State of S. Paulo, on the underside of leav- 

 es of a cultivated guava (Psidium cattlricuium Sabine). 

 The entire under surface of the leaves become coated with 

 a riñe white powder, while the upper surface is usually 

 covered with a black fungus". Specimens have been rec- 

 eived from Dr. F. Xoack. Instituto Agronómico, Campi- 

 ñas, Estado de S. Paulo, Brazil, on leaves of Myrtaceae 

 sp. March 30, 1898, and again on the same species of plant 

 June 14, 1898. Quaintance states tliat the adults are 

 uniqup in the genus Aleurodici(sy> due to the circular, 

 dusk}' spots on the wings of the adult. 



Type— Cat. X.o 14761, ü. S. Xational Museura. 



Dialeiirodicus tessellatns Quaintance and Baker. 

 (Lám. LXIX, BE) 



Bialeurodicus tessellatus Quaintance and Baker, U. S. 

 Dept. Agr., Tech. Series, 27, Pt. 1, 1913, p. 30. 



The larvae of this species have a narrow fringe oí 

 wax from the marginal tubes, while the adult pupa cases 

 are without wax. The pupa cases on the leaf are shiny 

 dark broAvn or blackish. Specimens have been received 

 from Ceara, Brazil, on Euqenia loiifford Linn., Januarv 

 1906, from Mr. F. Picha. ' 



Adults. Fnknown. 



Tf/pe. — Cat. X.° 14762, U. S. Xatioual Museum. 



