HEMIPTERA— HETEEOPTERA . 



141 



18.iv.l924, 3 specimens, x.192'1-, 2 specimens and 2 larvae, 2.xi.l924 (Armstrong) ; 

 Vailima : 3 specimens, vi.l924 (Bryan). 



Savaii : — Safune : 1 specimen, 15. v. 1924 (Bryan). 



Tutuila:— 1,100-1,200 ft., 1 specimen, iv.l918, 2 specimens, xii. 191 8 (Kellers); 

 Pago Pago : 0-300 ft., 4 specimens, iv. 1918 (Kellers) ; 13 specimens and 1 larva, 

 30.ix.l923 (Swezey and Wilder). 



Previously recorded only from Fiji, but allied to the Austro- Oriental species 

 D. argillaceus Bergr. 



Family Tingitidae. 

 Idiocysta, gen. n. 



Head above unarmed ; bucculae scarcely extending anteriorly, suddenly 

 convergent and contiguous so that rostral furrow is closed apically ; antennae 

 moderately long, two basal segments slightly incrassate, short, the first segment 

 distinctly longer than second ; third segment longest, slender, linear ; fourth 

 fusiform becoming gradually slender towards base ; rostrum extending to 

 middle of mesosternum, not reaching middle coxae. Pronotum tricarinate but 

 only the median carina visible ; anterior collar extending laterally to bucculae, 

 only moderately tectiformly elevated dorsally, not globosely dilated, its anterior 

 margin lightly convexly sinuate ; paranota originating just beyond lateral 

 carinae, strongly dilated and reflexed over disc of pronotum to form two elongate 

 coarsely reticulate, semi-globose hoods which almost meet over median carina 

 completely hiding whole of the pronotum except median carina and apex of 

 pronotum ; disc between carinae and below globose paranota covered with 

 long tomentose pale hairs. Propleuron broad evenly rounded. Hemielytra 

 complete, extending well beyond apex of abdomen ; in repose their costal margins 

 sub-parallel feebly sinuate in middle ; slightly wider across bases than across 

 membranes, but very little wider than pronotum at base ; discoidal area flat, 

 scarcely reaching middle of hemielytron ; sub-costal area very narrow, more or 

 less vertical ; costal area distinctly widened in middle, base reflexed, with a 

 single row of cells ; broad medial region with two rows of cells. Metasternal 

 orifice with a distinct auriculate lobe. Legs moderately short and slender. 



Genotype : — Idiocysta hackeri, sp. n. 



Apparently allied to Physatocheila Fieber but the head unarmed, the sub- 

 costal area of hemielytra narrow and vertical, the costal area widened in the 



