100 Mr. Edward Meyrick's Descriptions of 



Steobisia Clem. 



In the case of this genus, and also in the allied Zalithia 

 and Helcystogramma, I find it impossible to rely on the 

 presence of vein 7 of forewings as a generic or even as a 

 specific character ; in the typical species of Strohisia 7 and 

 8 are coincident, but in others (which for that reason I had 

 referred to Zalithia) they are stalked, and again in others 

 (as in suhvecteUa Walk.) they are stalked or coincident 

 indiscriminately. A further variation of structure is 

 found in the palpi, of which the second joint is quite smooth 

 in typical Strohisia, but in other species (as described 

 below) loosely rough-scaled above; these species are, 

 however, so closely alhed that they will not bear generic 

 separation. Hence I am constrained to find a more natural 

 separation between the genera in the proportional breadth 

 of the hindwings, which in Strohisia are about equal in 

 width to the forewings, whilst in Zalithia they are obviously 

 broader than the forewings; this definition allows all the 

 species with the characteristic blue-metallic markings of 

 Strohisia to be classed together. Similarly in Zalithia 

 ivalkeri Wals, (of which I have a long series), an insect 

 of very different superficial character to the above, veins 

 7 and 8 are found either stalked or coincident with nearly 

 equal frequency. 



Strohisia trissoxantha, n. sp. 



$. 12-13 mm. Head glossy dark blue-grey. Paljoi smooth, 

 orange-yellow, terminal joint dark grey. Thorax dark purple- 

 fuscous, with two orange stripes meeting behind. Forewings 

 elongate, apex obtuse, termen obliquely rounded ; 7 absent ; dark 

 purple-fuscous; a rather oblique orange streak from costa near 

 base not reaching dorsum; three moderate orange transverse 

 fasciae, first at \, marked with one or two dark dots, second beyond 

 middle, irregularly obliquely interrupted below middle, third 

 almost terminal, leaving a slender terminal streak on which are 

 three orange dots; alternating with these are three broad glossy 

 dark leaden fasciae occupjang whole space except narrow irregular 

 streaks margining fasciae : cilia violet-grey, on termen outer half 

 yellow- whitish. Hindwings dark fuscous; cilia grey with darker 

 basal shade, towards tij)s whitish-grey on upper part of termen. 



Peru, Jurimaguas, in March ; Brazil, Teffe, in January ; 

 three specimens. Of quite peculiar facies, yet structurally 

 a typical Strohisia. 



