298 THE CANADIAN ENTOMOLOGIST 



All dark markings intense black except on segs. 1 and 2, where 

 they are brown. Seg. 1 brown with a large gray spot on its lower 

 posterior angle. Seg. 2 brown with a middorsal pale stripe, the 

 auricle and the lower posterior angle pale. Seg. 3 pale with its side 

 nearly occupied by an anterior and a posterior black spot. Segs. 

 4-6 black with a pale band on the basal third. Seg. 7 similar 

 but the pale band occupying the basal half. In life this band is 

 very conspicuous because of the great amount of black before and 

 after it. Segs. 8 and 9 with the dorsum black, the apical edge 

 and the lower half of sides orange. Seg. 10 orange, browner at its 

 base. Appendages yellow. 



The appendages are like these of crotalinns and designatus. 

 The tips of the dorsal pair are not as slender as in designatus, and 

 the dorsal angle or hump is near the middle of the appendage. 

 The inferior appendage is as in designatus. 



Female. — Abdomen with appendages 36 mm. long; hind wing 

 30 mm. 



" Colour. — As in male but with the brown on segs. 1 and 2 

 reduced to an apical ring and a broad, lateral stripe. Segs. 3-7 

 each with a broad, middorsal, lanceolate, pale spot and a pale spot 

 on the lower edge of the side. Segs. 8-10 as in the male. 



The vulvar lamina is similar to that of designatus but the 

 lateral lobes are broadly triangular, two-fifths as long as seg. 9^ 

 and terminate in acute points caudad. 



The nearest relative seems to be designatus. 



This is named after the handsome black-and-white banded king 

 snake of California. 



i^schna arida, n. sp. 



Holotype.- — Male, from Fort Wingate, New Mexico, and now 

 in the collection of Dr. Calvert. 



Paratype. — Female, from "Oak Creek Canyon, Arizona^ 

 6,000 ft., Aug., F. H. Snow." This is one of a pair in the SnoAV 

 collection of Kansas University, at Lawrence, Kansas. 



The male of this pair in the Snow collection bears the same 

 pin label as the paratype, and is referred to in the description as 

 the "second male." 



Male. — Colour; face greenish, labrum with a black Ime across 

 its articulation; a narrow fronto-nasal line. T-mark conspicuous, 



