l6o ENTOMOLOGICAL NEWS. [April, ' T 3 



New Peruvian Parasites from Hemichionaspis 



minor (Hym.). 



By E. W. RUST, Assistant Government Entomologist, Lima, 



Peru. 



For the past year the writer has been engaged in work di- 

 rected against pests of the native or tree-cotton (Gossypium 

 penvuianum) in the Department of Piura, northwestern Peru. 

 During that time many enemies of the greatly feared plague 

 known as "piojo bianco" (Hemichionaspis minor Mask.) both 

 parasitic and predaceous, have been studied and of the former 

 group by far the majority belong to Aphelininae and Sig- 

 niphorinae. Several of these forms appear to be new to science 

 and it is for the purpose of gaining for them a definite name 

 and place in entomological literature that this short paper is 

 written. 



Some of the descriptions are from material reared by 

 Prof. C. H. T. Townsend, Entomologist to the Peruvian Gov- 

 ernment, to whom the writer is deeply indebted, not only for 

 the above-mentioned specimens, but equally so for his many 

 helpful suggestions during the prosecution of this work. The 

 remaining descriptions are from parasites reared by the writer, 

 the type specimens of which are to be deposited in the U. S. 

 National Museum. 



Genus PROSPALTELLA Ashmead. 1904. 

 Prospalta (=Prospaltella*), Howard; described in "Insect Life," 1894 



2 species no type designated. 

 ProspaUa (=Pros[>altc!la}, Howard; mentioned in "U. S. Tech. Ser. 



No. I," 1895 2 species no type designated. 

 Prospalta (=ProspaltcUa), Ashmead; mentioned in "Chalcidoidea," 



Jan., 1904 type designated as mitrtfcldtii. 



Prospaltclla, Ashmead; proposed in "Proc. Ent. Soc. Wash." 1904. 

 Prospaltella, Howard; mentioned in "U. S. Tech. Ser. No. 12, part 4," 



1907 type designated as aurantii. 



On studying this genus it becomes evident that the generic 

 description was drawn up from the species murtfeldtii, but Dr. 

 L. O. Howard, in his "Revision of the Aphelininae of North 

 America" (Technical Series No. 12, Part IV, U. S. Bureau of 



