Vol. XXlv] ENTOMOLOGICAL NEWS 293 



educational public services which he rendered and the scien- 

 tific societies which bore his name on their rolls. "The won- 

 der is that he was excellent in so many directions, surpassing 

 those who had given their lives to but one of his many in- 

 terests." 



He was twice married and is survived by six sons and four 

 daughters. P. P. C. 



(In response to a request for biographical data from the Academy 

 of Natural Sciences of Philadelphia, of which he was a correspondent, 

 Lord Avebury once sent a copy of The South American Journal, Lon- 

 don, for February 24, 1900, containing a sketch of his life. From this 

 sketch we have obtained many particulars.) 



On the Criorhina intersistens Walker and an Allied 



Species (Dipt.). 

 By CHARLES W. JOHNSON, Boston, Mass. 



For a number of years there has been considerable confu- 

 sion regarding the standing of Xylota badia and Eristalis 

 intersistens Walker. In the collections under my charge and 

 probably in the collections of others this confusion is due to 

 the presence of two species, the females of which closely re- 

 semble each other. 



That Walker's descriptions refer to one and the same spe- 

 cies is very evident, notwithstanding the absence of the facial 

 stripe in the description of X. badia. 



Female : Body brassy, head covered with pale tawny down * * chest 

 thickly clothed with long, pale tawny hairs ; abdomen black, clothed 

 with short hoary hairs, yellow on each side of base and thence in two 

 narrow stripes beyond the middle legs pitchy ; thighs pale yellow 

 towards the base, knees and extremities of shanks yellow, feet tawny, 

 hind feet pitchy, tawny at the base * * Length of the body 4 lines. 

 New York. (List Dipt. Brit. Mus. pt. Ill, p. 559). 



The description of E. intersistens (sex not given) is essen- 

 tially as follows : 



Body black, head clothed with whitish hairs and down, pale yellow 

 with three black stripes in front ' * chest and breast brassy green 

 clothed with tawny hairs; abdomen elliptical * * thinly clothed with 

 tawny hairs ; sides irregularly tawny for more than half the length 



