104 U.S. NATIONAL MUSEUM BULLETIN 25 7 



Meridarchis alta, new species 



Figures 141-142, 578 



Female, 22 mm. Head white. Palpus white, basal half black 

 above. Antenna whitish. Thorax white, a single round spot an- 

 teriorly. Abdomen white. 



Forewing moderate, suboval, costa gently curved, more so towards 

 apex, apex rounded-rectangular, termen gently convex, almost 

 straight, oblique. Pale slate gi-ey with a faint purplish tinge. Costa 

 broadly, termen less distinctly, suffused with white. Markings 

 black, narrowly edged with white suffusion. Costa with seven spots, 

 posteriorly becoming slightly elongate and oblique; first spot basal, 

 ultimate, subapical; five sub triangular spots on termination of veins 

 4-8, becoming larger towards apex, two upper ones broadly inter- 

 connected; a trace of a sixth spot on vein 3; discal spots sLx, larger: 

 two in an oblique series beyond base, roundish; four in a quadrangle, 

 anterior in cell at 2/5, upper beyond this, above cell, posterior on 

 upper angle of cell, these three spots circular; fourth smaller, elongate, 

 between cell and fold, beyond upper spot; a small elongate mark 

 along lower half of discoidal vein. Cilia slate grey with white base. 



Hindwing slate grey, becoming silvery towards base, paler than 

 forewing and glossy; a very irregular darker grey interrupted marginal 

 strigula along costa, in apex and along upper half of termen. CiUa 

 concolorous. 



Female genitalia: Resembling those of M. globosa Diakonoff . Ninth 

 segment moderately, but distinctly sclerotized throughout. Sterigma 

 shaped as a simple moderate plate, rounded beneath, upper edge with 

 a semicircular excision flanked by rather long and slender projections 

 which are considerably longer than in globosa. Apophyses and bursa 

 similar, but corpus bursae finely aciculate throughout except the ex- 

 treme end (in globosa there is a ring of stronger scobinations before 

 the end). 



Material examined: "Philippine Ids., Ace. C. M. 6151," 1 9, holo- 

 type, genit. slide 5716 (CMP). Allied to M. globosa Diakonoff, from 

 New Guinea. 



Meridarchis bifracta, new species 



Figures 131-132, 580 



Male, 18.5 mm. Head creamy, tips of scales on vertex black. 

 Palpus porrect, median segment slender at base, dilated by loose 

 scales toward apex above, terminal segment moderate, spindle- 

 shaped; blackish fuscous, apical half of median segment and terminal 

 segment except at base above, dusky creamy. Antenna infuscated, 

 scape with creamy top;flagellum with a dark fuscous, elongate spot 

 above apex, ciliations 1. Thorax creamy, shoulder appearing tawny 



