}IEOOSTETHUS GROSSUS. 227 



uti alee. Antenna cylindracese 24. articulis. Tibin' postica- 

 iiigrse dentibus albis, tenninatse quatuor unguibus prseter 

 ungues palmaruni. Femora postica latere inferiore rubra. 

 Totus supra obsolete brurmeus sen fusco-lividus, inter pedes 

 anticos acumen tboracis flavescens. 



(C. Linnseus, ' Faun. Suec.' p. 239, 1761.) 



MALE IMAGO.- -In general colouring the living' insect 

 is bright yellowish-green and brown, with crimson 

 hind femora. Size bulky. Length 22-32 mm. Expanse 

 of wings 42 5 -J mm. JVvMe triangular, the blunt apex 

 being forward; foveolae indistinct. Antenna fairly long. 

 Pronotum somewhat narrowed in front ; lateral carina? 

 nearly straight, median prominent ; transverse furrow 

 in front of the middle : hind margin bluntly rounded. 



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Thorax pale green ventrally. Elytra (PL XX, fig. 4) 

 more or less tinged with brown, especially at the apex ; 

 a yellow streak along the b.-isal two-thirds of the costal 

 region, in other parts nervures brown. Winy* brownish 

 at the tip, more or less hyaline elsewhere ; anterior 

 nervures brown, hinder ones mostly colourless. Fore 

 and mid legs brownish. Femur of hind legs carmine 

 beneath, with an internal black streak, swollen junction 

 of femur and tibia black ; tibia yellow, generally with 

 two black rings, spines black. Abdomen yellowish 

 ventrally. 



FEMALE IMAGO (PI. XXII).- -Colouring similar to that 

 of the male. Size larger, sometimes much larger. 



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Antennae not so long in proportion as those of the 

 male. Valves of the ovipositor elongate, with several 

 small crenulations above. 



EGGS. --Cigar-shaped ; very slightly curved in their 

 length ; considerably more pointed at one end than at 

 the other ; surface slightly granulated ; dull ochreous 

 yellow in colour (but colour may not be reliable, as the 

 eggs were not laid but extracted from the dead insect) ; 

 length about 5*8 mm., greatest diameter about 1 '5 mm. 



XYMPH.- -Xymphs may be recognised as such by the 

 undeveloped organs of flight. They are often almost 

 entirely of a beautiful rosy red colour. 



