THE CANADIAN ENTOMOLOGIST 299 



its stem triangular. Frontal vesicle edged with yellowish above. 

 Occiput small and pale, rear of head black, eyes brown (dried 

 material) with a conspicuous dash. 



Thorax brown. Dorsal stripes 1 mm. broad; enlarged at the 

 upper end. Lateral stripes yellowish, (probably greenish in life 

 with yellow ends). Both are broad and straight; the anterior 

 being slightly notched at the middle of its anterior edge and 

 narrower from there to the upper end. Anterior stripe 1.5 mm. 

 wide below, slightly narrower in its upper half; the posterior stripe 

 nearly 2 mm. wide. 



Each lateral stripe bordered on both edges of its entire length 

 with a wide band of dark brown. Wings hyaline, stigmata 4 mm. 

 long in type; 3 mm. in second male, dark brown above, yellowish 

 below. Legs black with the bases of the femora dark brown. 



Abdomen brown on segs. 1-3, black on 4-10 with blue mark- 

 ings. The figure shows the shape of these. 



M D present on segs. 3-7, P D is very large and roughly 

 triangular, fusing broadly below with PL. M L is present on 

 segs. 3-8. A L present on segs. 2-8. A narrow, apical band on 

 seg. 10. Ventral surface probably black. 



Female. — Colour — as in the male but with the brown of the 

 thorax paler. Veins of wings brown. Abdomen brown, becom- 

 ing darker caudad. 



This species is close to constricta, palmala and walkeri. See 

 figs. 6-15. The male appendages are broad as in walkeri, but have 

 the long terminal spines of constricta. The hamules show few 

 characters different from those of the above species. In the type 

 male these are thrown caudad with the extruded penis, hence the 

 difference between the figs. 8 and 9. In colour the male differs 

 from its relatives in the broad, lateral stripes and the wide, dark 

 borders to these. From walkeri in the presence of M D. From 

 constricta in the presence of P L on segs. 5-8. From palniata in 

 the greater amount of blue on the abdomen. The female is easily 

 distinguished by the appendages which are narrow, heavy and 

 nearly straight on the dorsal edge. 



The name refers to the desert region in which are the more: 

 humid mountains from which the types have come. 



