THE CANADIAN ENTOMOLOGIST 257 



apical ring and a lateral apical spot of irregular outline which is 

 one-fourth as long as the segment. Seg. 7 with an interrupted, 

 irregular stripe along the side, below the apical end of which is a 

 small detached spot. No apical ring on seg. 7. Segs. 8-10 blue? 

 —some irregular, obscure dark areas along lower side of seg. 8, 

 which may represent a black lateral stripe in better preserved 

 material. 



Dorsal appendages short with a large ventral hook on the 

 internal angle. Inferior appendage, bilobed, the lobes triangular 

 and subequal; the posterior lobe directed caudad, the dorsal lobe 

 directed dorsad, bearing on its apex an ill-defined spur directed 

 dorsad. Inferior appendages as long as seg. 10 and twice the 

 length of the superior appendages. 



Female unknown. 



Argia alberta, n. sp. 



Holotype. — Male, collected by the writer in the Owen's Valley, 

 at Laws, California, August, 1915, and now in the U. S. National 

 Museum. 



Paratype. — Female, collected by the writer in the Owen's 

 Valley, at Laws, California, August 17, 1915. and now in the U. S. 

 National Museum. 



This species simulates Argia sedula in colour and appendages, 

 but the penes show this to be more nearly related to the northern 

 violacea group, while sedula is nearer translata and a large series of 

 Mexican species. 



I take pleasure in naming it after my father Albert Hamil- 

 ton Kennedy. 



Male, length of abdomen 22 mm., hind wing 18 mm.; female, 

 abdomen 22 mm., hind wing 18 mm.; 



Male. — Colour: Labrum pale blue, the remainder of the face 

 and head blue with an olive or, in some dried material, a violet 

 cast. Under surface of head yellowish gray with a small black 

 spot on each side of the occipital foramen. Clypeus edged with 

 black. A wide bar through the paired ocelli and a broad, black 

 stripe behind each postocular area. Eyes dark blue, paler below. 



Prothorax black dorsally with a bluish spot on each side. 

 Mesothorax and metathorax dull blue (violet or brown in dried 

 material) darker and duller on the dorsal surface and grayish on 



