HEMIPTERA— MIRIDAE AND ANTHOCORIDAE. 



221 



27. Lygus kellersi, sp. n. 



In the key by Poppius (1914) this species would be associated with L. pacificus 

 Popp. and L. exiguus Popp., from both of which it may be distinguished by the 

 uniformly yellowish cuneus with apex only brownish, and by the sub-basal 

 transverse black band on pronotum. 



Colour. — Ground colour pale yellowish, apices of hind femora and a sub- 

 basal transverse band on pronotum black ; antennae yellowish, first segment 

 brownish at apex, second blackish apically, last two segments fuscous, except 

 basally ; hemielytra brownish, embolium and outer apical half of corium, except 

 apex, paler, cuneus uniformly yellowish, apex sometimes brownish ; basal 

 angles of scutellum, pleura, and sides of venter more or less brownish ; membrane 

 and veins brownish to fuscous. 



Structure. — Length 3-9 mm., width 1-7 mm. Head : width 1-04 mm., 

 vertex '30 mm., position vertical, frons only slightly convex, confluent with 

 tylus, in lateral aspect forming a broadly arcuate line ; vertex ecarinate, basal 

 margin concave, eyes extending back and covering anterior angles of pronotum. 

 Rostrum, length 1-64 mm., nearly attaining posterior margins of hind coxae. 

 Antennae : segment I, length -56 mm. ; II, 1-9 mm., cylindrical, slightly more 

 slender at base ; III, 1-08 mm. ; IV, -60 mm. Pronotum : length -91 mm., 

 width at base 1*47 mm., disc moderately and rather evenly convex, minutely 

 rugulose but scarcely punctate, lateral margins straight, calli scarcely evident 

 as swellings above contour of disc. Dorsum clothed with fine, short, pale 

 yellowish pubescence, scutellum smooth, impunctate. Embolar margins very 

 slightly arcuate. Legs moderately long, hind femora rather thick, length 

 1-8 mm., width -48 mm. ; tibia 2-8 mm. in length, spines in length slightly 

 exceeding diameter of tibia. 



Length 4-2 mm., width 2 mm. Head : width 1-12 mm., vertex 

 •39 mm. Antennae : segment I, length '61 mm. ; II, 1-88 mm. ; III, 1-12 mm. ; 

 IV, -65 mm. Pronotum : length 1-04 mm., width at base 1-73 mm. More 

 robust than the male, but very similar in pubescence and coloration, 



Tutuila : — 8 specimens (including holotype), 21.vi.l918, alt. 1,070 ft., 

 eastern end of island : 2 specimens, iv.l918, alt. 760-900 ft. (Kellers). 



