28 E. T. CRESSON. 



Ijyda lateomaculata. — J.^Blaok; head and thorax marked as in 

 atripes, except that the anterior spot on mesothorax is not confluent with 

 those behind and the large mark on pleura is not indented; antenuse long, 

 slender, about thirty-two jointed, pale fulvous, scape and apex of flagellura 

 black, third joint about twice the length of fourth; wings pale yellowish- 

 hyaline, nervures fuscous, stigma and costa pale yellow, third submarginal 

 cell longer than second, second branchial cell without cross-nervure ; legs 

 luteous, tibiae and tarsi tinged with fulvous, coxae pale yellowish, femora 

 above more or less black, anterior tibise with one side spur; abdomen luteous, 

 varied with brown, basal plates, first segment more or less and narrow apical 

 margin of remaining segments above black, apex dusky, venter luteous. 

 Length .50 inch. 



Hab. — White Mountains, N. H., (Morrison). 



Lyda nevadensis. — % . — Black ; clypeus, labrum, mandibles except tips, 

 narrow anterior orbits, spot on sides of face, spot at summit of eyes, two small 

 oblong spots behind ocelli sometimes wanting, line on cheeks sometimes con- 

 tinued on to occiput, two or three basal joints of antennse, sublunate spot on 

 anterior lobe of mesothorax sometimes much reduced or wanting, collar be- 

 neath, large oblique mark on pleura, spot on pectus in front of middle coxse, 

 and tegulse, all yellow; head coarsely punctured above; antennse long and 

 slender, thirty-four to thirty-six-jointed, third joint more than twice the 

 length of the fourth; wings hyaline, generally dusky towards tips, sometimes 

 uniformly smoky-hyaline, nervures black, second branchial cell without cross- 

 nervure; coxse, trochanters and femora beneath luteous-yellow, tibise and tarsi 

 honey-yellow, posterior pair more or less fuscous; anterior tibise ^fith one side 

 spur; abdomen fulvous or fulvo-ferruginous, basal plates and first two segments 

 black. Length .45 — .50 inch. 



% var. — Antennse more or less pale on basal half; thorax black immaculate ; 

 coxae and femora except tip, black. 



Hab. — Nevada, (Morrison). This may be the % of Morrisoni. 



Lyda montivaga. — '^ .—Black, shining; spot at summit of eyes, lower 

 posterior orbits, triangular spot on sides of face, clypeus, mandibles except 

 tips, palpi and seape beneath, yellow ; head sparsely punctured ; antennse long 

 and slender, thirty-six to thirty-eight-jointed, third joint more than twice the 

 length of fourth; wings hyaline, faintly dusky at tips, second branchial cell 

 without cross-nervure; tibise and tarsi dull ferruginous, anterior tibise with 

 one side spur; abdomen ferruginous, basal plates, and the first, and more or 

 less of second segments black. Length .45 inch. 



Hab. — Nevada, (Morrison). Closely allied to nevadensis. 



Lyda nigripes. — %. — Black, shining; head strongly punctured; line 

 on mandibles yellow; antennse entirely black, about thirty-six-jointed, third 

 joint nearly three times the length of fourth; thorax feebly punctured; wings 

 dusky, with a subviolaceous reflection, second branchial cell without cross- 

 nervure; four anterior tibiae and tarsi and spurs on posterior tibise ferruginous, 

 anterior tibise with one side spur; abdomen ferruginous, basal plates, and first 

 and second segments black. Length .50 inch. 



Hab. — Nevada, (Morrison). Closely allied to montivaga. 



