154 



INSECTS OF SAMOA. 



ing segments infuscate ; rostrum yellow with a brown stripe down each side of 

 first segment and the apical segment brown. Pronotum and scutellum dull 

 yellow ; pro- meso- and meta-pleura more or less infuscate the pale pubescence 

 restricted to longitudinal stripes giving a striated brown and yellow appearance. 

 Metasternum with a median dark brown stripe. Hemielytra more or less 

 greyish-yellow, the costal margin rather darker, the membrane with a suspicion 

 of mottling ; a brown spot over vein at base of internal membranal cell. Inner 

 surface and two broad transverse stripes on outer surface of anterior coxae, 

 brown ; inner surface of anterior femur except for some longitudinal yellow 

 striation, a narrow percurrent line along spines, another line broken into four 

 pieces, and some mottling between the lines, brown ; short spines brown, large 

 spines pale yellow with brown tips. Inner surface of apex of middle femur 

 brown and of hind femur slightly infuscate, underside of base and the apex of 

 anterior and intermediate tibiae brOwn ; hind tibiae pale yellow ; all tarsi 

 brown. Abdomen brownish-yellow, spiracles brown, disc of venter with two 

 percurrent parallel brown lines thickened at base of each segment and fusing on 

 ultimate segment, sometimes almost obsolete. 



Structure. — ^. Head slightly shorter than pronotum (75 : 85) anterior 

 longer than posterior lobe (45 : 25) ; anterior lobe with two short forward spines 

 between antennae but unarmed down sides either by spines or bristles ; posterior 

 lobe with a row of six bristle-bearing tubercles down each side and with two 

 similar tubercles and several smaller ones along posterior margin ; first rostral 

 segment extending to middle of eyes ; first antennal segment equal in length 

 to head ; relative length of segments, 75 : 105 : 24 (last segment mutilated in 

 type). Pronotum less than twice as long as wide at base (85 : 50) ; humeral 

 angles moderately elevated and acute but not spined ; anterior propleural spine 

 moderately short less than the diameter of an eye. Hemielytra extending to 

 about three-fourths the length of abdomen (to fifth visible spiracle). Anterior 

 <30xae not extending to base of prosternum, armed with several short spines ; 

 the femur with four large spines in anterior percurrent row and two in shorter 

 posterior row of short spines ; femur longer than tibia, about as long as from 

 anterior margin of eyes to posterior margin of pronotum. Relative lengths of 

 anterior coxa, femur, tibia and tarsus, 25 : 125 : 110 : 27 ; intermediate leg, 

 140 : 150 : 24 ; posterior leg, 246 : 290 : 27. Last abdominal tergite in male with 

 posterior margin broadly concave, the posterior lateral angles only moderately 

 acute and not extending beyond apex of pygophor. 



