Mr. A. G. Butler on a neio Sjjecies o/Aphsena. 127 



EXPLANATION OF PLATE V. 



Fir/. L Schizoporella incrassatn, n. sp. 1 «. Marginal zooecia. 



Fiij. 2. Porella rostrata, Hincks. Ocecium. 



Fif/. 3. Sfhizoporella aperta, ii. sp. 



Fit/. 4. ScJnzoporeJla levata, n. sp. 



i^/y. 5. Monoporella albicans, n. sp. 5 rt. Cell witli ooecium. 5 b. Large 



aviciilai'ium. 

 Fifj. 6. Membranipora pilosa, form mtdfispinata. 

 Fir/. 7. Fhtstra ilentiijera, n. sp. 7 «. Nat. size. 

 Fi(j. 8. SteijanoporeUa magnilabris, Busli, witli the membranous covering 



in situ. 8 a. Diagrammatic ligm-e, showing the tubular entrance 



to tlie lower chamber *. 

 Fie/. 9. Stcf/anoporeUa Keozelanica, Busk (Viucularian form), with its 



membranous covering. 9 a. Showing the structure of the cell. 



9 b. Nat. size (two forms). 



XVI. — Descnption of a new Species of the Homopterous 

 Genus Apliajna from Sumatra. By Artbur G. Butler, 

 F.L.S., F.Z.S.,&c. 

 The species which I here describe was obtained last year by 

 purchase, and it struck me at once as a very beautiful and new 

 Homopteron allied to Aphcena suhmaculata ; but upon showing 

 it to my friend Mr. W. L. Distant, I found that he was in- 

 clined to regard it as a very fine and highly coloured variety 

 of that species, though without careful comparison of the 

 structural details of the two insects he was not prepared to 

 declare absolutely that they were not distinct. This, after a 

 minute examination of our specimens, I am fully convinced 

 to be the case, and tlierefore 1 do not hesitate to describe the 

 species. 



Aplioina cliionaima, sp. n. 



General form of A. suhmaculata, but the tegmina relatively 

 broader across the middle, owing to the greater arch of tlie 

 costal margin f ; the outer margin is also very decidedly- 

 longer, forming an oblique straight edge instead of an arch 

 continuous with that of the apical portion ; the apex, there- 

 fore, is more prominent than in A. suhmaculata. The thorax, 



* Actually the orifice of the tubular passage is placed far down within 

 the upper chamber, and is not easily seen. 



t Tliis I have proved by careful measurement, the difference in width 

 between the middle and tlie widest part in these wings being exactly 

 2 milliiu. both in the larger and the smaller insect ; to an artistic eye 

 the dill'ereut outline is most marked. 



