160 Transactions. — Zoology. 



Rhinocola eucalypti, sp. nov. Plate X., figs. 3-16. 



Adult female of a general dark -purple colour, almost 

 black ; length of body about -^^in- When viewed dorsallj-, 

 the head and thorax are dark-purple, the wing-attachments 

 yellow ; there is a very thin whitish meal on the thorax ; ab- 

 domen dark-purple, banded transversely with yellow ; antennae 

 yellow, turning to black at the tips ; genitalia black ; eyes 

 dark-brown, prominent ; wings membranaceous, greyish- 

 white, veins yellow. Viewed ventrally, the head and thorax 

 are purple, with yellow stripes ; legs dark-yellow. Head 

 broader than long, rather deeply depressed in front, and pro- 

 longed into two short, roundly conical processes. Ocelli two, 

 close to the eyes. Eostrum short, cylindrical, and bearing 

 three moderately long setae. Forewings elongate, length about 

 two and a half times the breadth. Margins somewhat straight 

 and parallel, ends broadly rounded ; the veins are almost all 

 nearly straight. The costal vein runs all round the margin ; 

 the stalk of the cubitus (fig. 4, he) is almost twice as long as 

 the stalk of the subcosta (fig. 4, hd) ; the cubitus forks twice, 

 the second furcation being close to the apex of the wing, the 

 lower main branch forking again near the middle of the mar- 

 gin, with one long and one sliort secondary branch ; the 

 subcosta also forks twice, the main branch (the radius, fig. 4, 

 df) being straight and nearly parallel to the cubitus, the other 

 branch forking very close to the margin with one very short 

 reflex branch, and one very long, which meets the costa at a 

 point as far from the radius as the latter is from the cubitus ; 

 the whole area enclosed between the costa and the two se- 

 condary branches of the subcosta is occupied by the stigma 

 (fig. 4, ss), which is thus very long and narrow, but not very 

 distinctly marked. Hindwings elongate, broadly rounded at 

 the tips, with three longitudinal veins not clearly reaching the 

 margin, and only the posterior one is forked. Antennae of ten 

 joints — the first two rather short, thick, and smooth, the rest 

 very slender, and numerously ringed ; the third joint is the 

 longest, the sixth and eighth subequal and nearly two-thirds 

 as long as the third, the rest rather shorter and subequal ; the 

 last joint is slightly dilated, and bears two unequal spines at 

 the tip. Legs moderately slender ; tarsi dimerous ; claw 

 double ; several short hairs on all the joints. Genitalia bi- 

 valve, somewhat sharply pointed ; the lower valve is as long 

 as the abdomen, the upper a very little shorter ; several short 

 hairs on both valves. 



Adult male very similar to the female, excepting in the 

 genitalia, which consist of several appendages carried erect, 

 dorsally, on the last segment of the abdomen. The figure 8 

 of Plate X. gives a clearer idea of these appendages than any 

 written description could do : a is the " genital plate," which 



