Entomol. Mitteilungen III, 1914. Nr. 9. 259 



H. Sauter's Formosa-Ausbeute: Geometridae (Lep.). 



Von Louis IJ. Prout (London). 

 (Schluss.) 

 *86. Cliiasinia abraxides Prout, nov. sp. — (J, 21 min. Shape, 

 structure and coloration of strigata, maculata, radiata and connexa Warr. 

 (all from N. India), lutearia Leech (from Japan; as Boarmia — Fidonia 

 olim), pygmaearia Leech (from Chang Yang; as Tephrosia), coalescens 

 Bastelberger (as Ectropis) = flavipicta Wileman (as Hirasa), conjuncta 

 Wileman (as Alcis ?) and virgata Wileman (as Alcis ?) (all the last 3 from 

 Formosa) ; all tliese certainly form a compact group and conform to 

 the strnctnral characters of the superficially rather different clathrata L., 

 the type of Chiasmia. Antennal ciliation not more than one-half the 

 diameter of the shaft (in all the other spceies of the groiip long^). 

 Abdomen straw yellow, dark belted. The straw j^ellovv vertex and 

 wings almost entirely free from fiiscous irroration or strigiilation, the 

 dark markings therefore sharply defined; the scaling forms, nnder the 

 lens, very manifest transverse lines or ridges, which is also observable 

 in radiata. Forewing with costal margin fuscous to first band; first 

 fuscous band subbasal, bounding the fovea distally and confluent with 

 a spot which Stands between fovea and cell; cell-spot large, nearly 

 spherical; 2^^ band arising from a costal patcli opposite to and con- 

 fluent with the cell-spot, very strongly excurved round the cell-spot 

 distally; S''^ band broken into a curved row of vein-spots, those on the 

 medians confluent with the 2*^^ band; subterminal band composed of 

 a quadrate costal spot, a streak between radials and a broad curved 

 streak (patch) from M^ to hindmargin; a narrow terminal band from 

 SC^ to tornus, partly interrupted between R^ and M^; fringe dark 

 chequered. Hindwing with broad subbasal band, not reaching costa; 

 large roundish cell-spot; curved postmedian band of partly confluent 

 spots, not reaching costa; interrupted subterminal and terminal bands. 

 Under surface the same. Alikang, 7 October 1909, the type unique. 

 abraxides has very nearly the markings of lutearia Leech, but that is 

 larger, has relatively more elongate wings than the rest of the group 

 and has the vertex and dorsum mostly fuscous, the ground-colour of 

 the wings largely obseured by fuscous strigulatiou. Bastelberger (Iris 

 XXII, p. 180) records fitrigaia Warr. from Foriiu).s:i; it is just possiblo 

 he had a specimen of the present species or of the foilowing before him. 



1) I cannot at present study strigata, maculata and connexa, but as 

 Ilanipson unitos these with radiata in ono specios, tliere is piobably no 

 very wide structural divergence. 



17* 



