258 THE CANADIAN ENTOMOLOGIST 



the sides. Mid-dorsal stripe occupying one-third of the area be- 

 tween the humeral sutures. Humeral stripe half as wide as the 

 mid-dorsal, its upper third forked. A black line on second lateral 

 suture 1 mm. wide. 



Pterostigmata brown subtended by one cell. Legs pale with 

 blue on base of femora, broadly marked with black on the dorsal 

 and anterior surfaces of the femora and on the anterior and in- 

 ternal surfaces of the tibise. Tarsi black. 



Abdomen with segs. 1-3 dull blue becoming duller or brownish 

 on the lower sides. Seg. 1 with a baso-dorsal black spot. Seg. 2 

 with a narrow apical band and a lateral stripe black. Seg. 3 with 

 the apical third and a lateral stripe black. Segs. 4-7 with the 

 apical third and the dorsum black except a narrow basal band 

 blue, the sides bluish or brownish. Segs. 8-10 pure, pale blue the 

 lower edges more or less blotched with black. 



Superior appendages twice as long as wide when viewed 

 from above, slenderer in profile. A prominent, internal, apical 

 hook directed ventrad. Inferior appendages bifid, the lower 

 ramus round or bluntly triangular directed caudad, superior lobe 

 directed dorsad and terminating in an acute point. 



Female.- — Colour as in the male but with the blue of the 

 head and thorax paler. Eyes gray bluish above. Humeral stripe 

 but half as wide as in the male, its branches linear. Legs marked 

 as in male but the black on the femora reduced somewhat. Abdo- 

 men brown with a narrow apical band on segs. 2-6. Segs. 2-6 

 with an apical dorsal spot, a lateral stripe and an oblique spot on 

 the lower apical angle of the side. Seg. 7 with dorsal half black 

 except a narrow band across the base. Segs. 8-9 with dorso- 

 lateral stripe. Seg. 10 pale. In some females seg. 6 is coloured 

 like 7. 



Mesostigmal laminae with no special modifications. 



A single male of this is in the Snow Collection from Colorado 

 Springs, Colo., collected by E. S. Tucker. A male and female 

 from Provo, Utah, are in the collection of Dr. Ris. 



Argia hinei, n. sp. 



Holotype. — Male, collected by the writer at Fillmore, Ventura 

 Co., Calif., Aug. 7, 1915, and now in the collection of Mr. William- 

 son. 



