BY R. J. TILLYARD. 229 



3. A red radial mark of full length in forewing: the same wing with pale reticu- 

 lation more or less clearly outlined on all the main veins and cross-veins. 



E. ipeciabilis Westwood 

 No red radial mark in forewing, and no pale reticulation except on the cross- 

 veins beyond the lunule E. purpurescens, n.sp. 



4. Forewing with pale reticulation of main veins and cross-veins; a definite, 

 whitish subhumeral oval mark present on forewing .... E. lunulata, n.sp. 

 Forewing without any pale reticulation, the main veins and cross-veins entirely 

 dark; no subhumeral oval mark present E. lacusiris, n.sp. 



EUSTHENIA SPECTABILIS Westwood. 



Westwood, in Griffith's "Animal Kingdom." Insects, vol. ii., 1832, p. 348, PL 

 Ixxii., fig'. 4. 



Newman, "On the synonymy of the Perlites . . ." Mag. Nat. Hist., New 

 Series, vol. iii., 1839, p. 33. 



From Newman's short description we learn that this species had on the fore- 

 wing, "an elongated red spot near the costal margin" and "beyond and below 

 this a large blotch of dirty white," while the hindwings were "red at the base 

 and black externally." These details would scarcely be enough, by themselves, to 

 determine which of the Tasmanian species was really E. spectabilis. But, taken 

 in conjunction with a study of the British Museum series of specimens, they en- 

 able us to define the species more accurately. 



In the British Museum there are four specimens arranged together under 

 the name "spectabilis.'' The first three of these are conspecific, the fourth is 

 quite distinct. The first specimen bears a label "E. spectabilis" and appears to 

 be the type. This and the two following specimens agree with Newman's defini- 

 tion, the red radial stripe being clearly present, and the lunule broad and dis- 

 tinct; in the hindwing, the division between red and grey-black is somewhat 

 dyslegnic, and ends on the costa about half-way. The fourth specimen has no 

 radial stripe, the costal space of the forewing being purpurescent throughout; 

 it differs further from the other three specimens in having the subhumeral oval 

 mark present, in the very dyslegnic division between red and black on the 

 hindwing, with the red tending to spread out distally along the costa, and also 

 in having an exceedingly wide lunule on the forewing. 



True E. spectabilis may now be defined as follows : — Pronotum with a 

 brownish anterior lobe, distinctly convex, with very distinct sculpture of an 

 arabesque type, slightly raised above the ground level. No subhumeral oval 

 mark on forewing. Radial mark of forewing typically reaching from beneath 

 humeral veinlet to above top of lunule. with a slight downward prolongation on 

 M.-,. Lunule fairly well defined, about 2.5 mm. wide, and not completely crossing 

 the forewing. Division between red and black on hindwing somewhat dyslegnic, 

 ending on costa about half-way. The pale reticulation is present on main veins 

 and cross-veins of forewing, being only moderately well outlined in pale grey. 



N. Banks states that, in the male of E. spectabilis, "the superior appendages 

 are widened at the tip and acute on the inner side." The specimen named E. 

 spectabilis by Banks in the Hope Museum. Oxford, is, however, not that species, 

 but is conspecific with the fourth specimen in the British Museum series {^E. 

 purpurescens, n.sp. of this paper). As I have no males of E. spectabilis, but pos- 

 sess one of E. purpurescens, in which the male appendages do not fit this de- 

 scription, it is to be assumed that Banks* remarks do actually apply to the male 

 of E. spectabilis. 



Type, in British Museum Collection. 



Hab. — Tasmania, chiefly in the south (Hobart). 



