Mr. D. Griffin 07i an unusual Affection of the Eye. 281 



^ Sp. 2. Ozod. gracilis, Westw. Fusco-ochracea ; rostro subfiilvo; anten- 

 nis fuscis, basi ochraceis ; thorace subvittato ; alis subfumosis, nervis stig- 

 mateque ochraceis. — Long. corp. lin. 10. ^ . 

 Habitat in Brasilia. — In mus. nostr. 



Ceuozodia, Westw. (Ozocera,Westvr, Zool. Journ. No. 20. ined. — nee Ozo- 

 dicera, Macq.) 



LivmobicE affinis. Antennae thorace paulo longiores, articulis 32 ; 3 — 31, 

 ramulum longum emittenti. Palpi perbreves. Alarum nervi ut in Gynoplistia 

 vili dispositi. 



Sp. 1. Cer. inter rupta, Westw. Ochracea; ramulis antennarum subfuscis; 

 alis maculis 4 parvis discoidalibiis longitudinaliter collocatis, cinereis. — 

 Long. Corp. lin. 10. In mus. D. Hope. 



Habitat in Australia apud " Swan River." 



BiTTACOMORPHA, Westw. 



Genus anomalum Tipulariis terricolis, Latr., evidenter pertinens. Caput 

 et thorax parva. Abdomen valde elongatum et depressum. Pedes longitu- 

 dine mediocres; femoribus tibiisque gracilibus; tarsis basi dilatatis dense 

 ciliatis. Alae nervis perpaueis, fere ut in genere Sciophila dispositis. 

 Antennae graciles, filiformes. Palpi capitis longitudine, articulis 4 aequalibus. 

 Lobi labiales niagni. Ocelli ? 



Sp. 1. Tipiila clavipes. Fab, Sp. Ins. 2. 404. Ftychoptera clavipes, Fab. 

 Syst. Rhyng. Wied. Auss. Zweifl. Ins. 1. 59. — Long. corp. lin. 8. Exp. 

 alar. lin. 8^. 



Habitat in America Boreali. In Insult Newfoundland. — In mus. nostr. 

 — Commun. Dom. Churton. 



Midas maculiventris, Westw. Obscure niger; abdomine testaceo-fuscanti, 

 segmentis apice pallidis et (nisi segmentis duobus basalibus) macula triangu- 

 lari obscura in medio notatis; hae maculae versus apicem abdominis magni- 

 tudine crescunt : segmento anali fusco ; abdomine toto subtus concolori; 

 alis flavido-tuscantibus, regione nervorum internorum colore obscuriori 

 tincta. — Long. corp. lin. 11. Exp. alar. lin. 19. 



Hab. ? — In mus. nostr. 



MiUAS auripennis, Westw. Niger; capite.cum antennis, pedibus (nisi basi 

 femorum) abdomine (nisi segmento basali marginibusque terminalibus seg- 

 mentoruni 2 et 3,) laete luteis ,• alis auricoloribus, macula versus apicem 

 costae nigra, margineque interno pallido, mesosterni lateribus unispinosis. 

 Alarum nervorum directio Midasibus veris paulo discrepat. — Long. corp. 

 lin. 11. Exp. alar. lin. 19. 



Habitat in Nova Hollandia. In mus. Hope et nostr. 



Midas viduatus, Westw. Niger; faciei thoracisque lateribus, et macula 

 triangulari utrinque ad basin segmentorum 3 et 4 abdominalium, sericie 

 argentea obtectis ; alis pallidis in medio fuscantibus, nervis fuscis.— Long, 

 corp. lin. 10. Exp. alar. lin. 16. 



Habitat in Nova Hollandia. — In mus. nostr. 



XL VII. On an unusual Affection of the Eye, in nsohich three 



Images were produced. By D. G ii i ffi N, Esq. * 



n^^HE following affection of the eye is, I believe, a very iin- 



■'■ usual one. I have seen no account of such a phacno- 



menon in any of the writings on the physiology of vision, and 



* Communicated by the Author. 



Third Scries, Vol. 6. No. 34. April 1835. 2 O 



