152 



INSECTS OF SAMOA. 



meso-pleura fuscous. Hemielytra pale yellow ; with a percurrent longitudinal 

 stripe, extending from base of clavus to apex of membrane, fuscous becoming 

 pale towards apex of membrane ; stigma sometimes with a pale pink suffusion 

 the vein bounding it internally also tinged with pink. Legs fulvous yellow, 

 apices of femora and bases of tibiae bright red ; apices of tibiae especially anterior 

 tibiae, fulvous, tarsi infuscate. Abdomen sordid yellow with a broad somewhat 

 suffused fuscous stripe down each side. 



Structure. — $. Head about one and a half times longer than wide across 

 eyes (35 : 23) ; the anterior lobe, excluding region anterior to insertion of 

 antennae, equal in length to posterior lobe (13) ; posterior lobe slightly wider 

 than anterior lobe between eyes (19 : 17) ; transverse impression between lobes 

 placed slightly behind level of posterior margins of eyes, not strongly concave ; 

 relative lengths of antennal segments 140 : 58 : 85 : 45. Posterior lobe of 

 pronotum two-thirds the length of anterior lobe (20 : 30) ; width across humeral 

 angles about four-fifths the total length of pronotum (38 : 50) ; pronotal spines 

 about as long as posterior lobe in the middle (20) inclined laterally and slightly 

 anteriorly. Mesonotal spine about as long as pronotal spines and inclined 

 slightly posteriorly, metanotal spine short about one-fourth length of mesonotal 

 spine. Hemielytra extending to apex of abdomen, basal membranal cell narrow, 

 more or less parallel sided, apical membranal cell large, its apical marginal vein 

 strongly bent to form a rectangular indentation {see fig. 266). Relative lengths 

 of femur tibia and tarsus, anterior leg, 96 : 110 : 29 ; intermediate leg, 

 120 : 132 : 24 ; posterior leg, 200 : 245 : 25. Posterior lateral angles of last 

 segment of connexivum ($) obtuse not produced into an acute tooth or spine. 

 Male genitalia figured (26c). 



Total length : $ 10-5 mm., ^ 10-3 nmi. 



Upolu : — Tuaefu : Sliding Rock, 1 larva, 16.ix.l923 (Swezey and Wilder) ; 

 Apia: 1 $ (type), 13.iv.l924 (Armstrong); Vailima : 1 specimen. I.i.l925, 

 1 specimen, 2.i,1925. 



Tutuila : — Pago Pago : 1 specimen, 30.ix.l923 (Swezey and Wilder) ; 

 Amauli : 1 specimen, 5.ix.l923 (Swezey and Wilder) : Afono Trail : 5 specimens 

 (1 broken), 25.ix.1923 (Swezey and Wilder). 



Closely allied to the New Caledonian Polytoxus acanthifera Montr, and Sign. 

 (=P. acanthophorus Stal), which I know only from description, and possibly 

 only a subspecies. Differs in the smaller size, less distinctive coloration, and 

 in first two antennal segments not being yellow. 



