ENTOMOLOGICAL NEWS [July, 'll 



rate. I yet believe that it is not different from aMicta, all the 

 characteristic maculation being obvious. The only disturb- 

 ing feature is in the smoky secondaries, those of all the aMicta 

 that I have ever seen being whitish. 



I am ready, under the circumstances, to admit a species that 

 I have never seen, and which is the true hamamelis Gn., as 

 distinct from afHicta Grt. 



Acronycta speratina Smith. 



Hampson refers this as a synonym to sperata, mentioning it 

 again under Ab. i, as larger and paler, fore wing with the 

 markings more diffused. 



As species go in this genus, I am not ready to assent to this 

 disposition of speratina, which is at least a very good geo- 

 graphical race, and I am inclined to hold out for its rank as a 

 good species. 



Notes on Pennsylvanian Diptera, with two new 

 Species of Syrphidae. 



By W. R. WALTON, Bureau of Entomology, Washington, 



D. C* 

 (Plate IX). 



Criorhina (Penthesilia) nigriventris n. sp. 



Habitat Pennsylvania. $ Length 17 mm. Antennae blackish, ist 

 joint black, shining, a little longer than second which is black verging 

 to brown on apical end. Third joint distinctly broader than long, 

 front border convex. Front and face golden yellow pollinose, some- 

 what more dense on sides. Cheeks and oral margin shining black. 

 Sides of antennal tubercle and transverse impression of face sparsely 

 clothed with long black hairs. Pile of ocellar triangle black, that 

 of vertex yellow. Thorax black with a median opaque band, also 

 an elongate opaque spot extending from post alar callus nearly to 

 but not touching the transverse suture. Elsewhere shining and 

 covered with long pale yellow pile excepting a faint transverse band 

 of black hairs just caudad of the transverse suture. Scutellum 

 black, shining, covered with long pale yellow pile. Pleurae yellow 

 pilose. Abdomen broad, entirely shining pitchy black, covered with long 



*Published by permission of the Chief of Bureau. 



