128 



[June, 



nppeiHhi^'es the first three differ very widely inter se, and the third 

 (humuh) iiud fourth {orotypus) follow the same general plan. 



Intense confusion exists in the synonymy and bibliography. I 

 have not attempted to go through all the works, and do not think the 

 nomenclature here adopted would be materially influenced by so doing. 

 A re-examination of Stephens' collection has been made. This col- 

 lection was re-arranged by a non-expert after it was placed in the 

 British Museum, and in endeavouring to find, or fix, the types, 1 have 

 relied upon the particular specimen the pin of which bears a MS. 

 label in Stephens' hand (though possibly not so placed by him) ; 

 occasionally this label is absent {marginatus is a case in point, but the 

 description is suiEciently conclusive, combined with the printed label). 



I take it to be impossible to confuse the males if the anal charac- 

 ters be attended to ; the females of lutescens and humuli are more 

 difficult. 



It is very probable that all the four species here noticed are 

 nearctic as well as palaearctic. 



H. MARGINATUS, Steph. (1836), McLach., Wallengr., Eostock, 

 E-euter, &c. 

 lutescens, Zett. {sec. Wallengr). 

 Body almost wholly pale yellow, almost whitish in the dry insect; a narrow 

 brown (or blackish-brown) line on either side of the thorax (scarcely apparent on 

 the sides of the head above) : antennae yellow, not appreciably annulated : abdomen 



often with faint darker dorso-lateral 

 markings, usually becoming fusces- 

 cent above in the dry insect ; legs 

 pale yellow, the tarsal joints faintly 

 darker at the tips. Anterior-wings 

 broad-oval, the costal area much 

 broader at the base than in the 

 allied species, consequent on the 

 costal margin rising almost abruptly 

 at that portion, the apex obsoletely 

 sub-acute, and the apical margin somewhat oblique, an appearance intensified by 

 the nature of the markings ; the sub-basal bhu-kish point small and not prominent, 

 frequently sub-obsolete ; the most permanent markings consist in five or six elongate 

 Qark grey streaks (the first at the base) along the dorsal margin, separated by pale 

 spaces, sometimes continued upward into the membrane; nervules in the costal area, 

 and the other neuration, with blackish spaces, but not conspicuously ; gradate ner- 

 vules blackish, the lowest* in the inner series usually placed far towards the apex 

 and midway to the outer series ; the area between the lower cubitus and the dorsal 



• In these deacriptions no great importance should be attached to this gradate nervule (nor 

 to others). I have only indicated the condition as exemplified on examination of a large number 

 of specimens. The nervule closing the second post-costal cellule and others below it are not here 

 reckoned as belonging to the inner gradate series. 



