242 Journal New York Entomological Society, [Vol. xxiii. 



Types — Catalogue No. ip882, U. S. N. M., the above specimens on 

 a slide. 



2. Arrhenophagus albipes new species. 



Female. — Length 0.40 mm. 



Differs from the preceding in that all of each leg is white and the vena- 

 tion terminates in a small, fuscous area. Face yellowish. 



Described from four females labelled as previously and " 1389. 

 Chionaspis engenia: Mask. On female scales. Hong Kong, China, 

 Koebele." 



Types — Catalogue No. ip88s, U. S. N. M., the above specimens on 

 a slide. 



A second slide bearing many specimens labelled " Parasite of orange 

 scurvy scale from Kiomachi, Gifu. Japan (Nawa), January 30, 1899." 

 And another one labelled " 1407. Diaspis brasiliensis. On fern, 

 Jamsui. A. Koebele." 



ON DIFFERENTIAL INCIDENCE OF THE BEETLE 



BRUCHUS. 



By J. Arthur Harris, 



Cold Spring Harbor, N. Y. 



Introductory Remarks. 



Beetles of the genus Bruchus subsisting upon the seeds of Phase- 

 olus, Pisuni, Vigna, Vicia and other cultivated legumes may deposit 

 their eggs upon the young pods through which the newly hatched 

 larvae penetrate to the developing seed or upon the matured seed it- 

 self. B. ohtectus, the common pest of the bean Phascolus vulgaris 

 may develop in either manner. The purpose of this note is to con- 

 sider the question whether when the eggs are laid on the young pods 

 the frequency of parasitization is in any degree determined by the 

 characters of the pod. 



The assembling of the data here presented was begun in an effort 

 to explain certain anomalous results obtained in physiological studies 

 of seed weight in garden beans. Since these purely botanical ques- 



