1893.] DE. G. Ti. JOKNSOX ON THE SEAL's ETE. 719 



banded with pale fuscous, the anterior legs a little clouded with 

 fuscous. Pronotum smooth, obsoletely, minutely puoctate on the 

 posterior lobe. Hemelytra longer than the abdomen, the veins 

 and a series of spots at the apex of the membrane fuscous. Outer 

 margin of the abdomen piceous. 



Length to end of abdomen 4 millim., to tip of membrane 4| 

 miUim. ; width of base of pronotum | millim. 



One specimen is in the collection from this island. 



This species seems to be not rare in Cuba. Several specimens 

 have been sent to me from that island by Dr. Gundlach, and others 

 are in his collection. 



Fam. Veliid^. 

 Genus Micbotelia, Westw. 



MiCEOTELlA MAEGIKATA, Sp. nOV, 



Dull black, nearly wedge-shaped, minutely pubescent, and 

 obsoletely punctate, with the breast orange and the pronotum 

 bordered with orange. Head rather blunt, convex between the 

 eyes, a little compressed and produced at the end of the clypeus, 

 the underside pale testaceous. Antennse stout, closely hairy, 

 black ; third and fourth joints longer than the others, the fourth 

 longest, acutely tapering at tip ; the basal joint thicker than the 

 others, much longer than the second, pale beneath. Rostrum 

 stout and swollen at base, reaching behind the anterior coxae, pale 

 testaceous, piceous at tip. Pronotum broad, moderately convex, 

 with the humeral angles bluntly rounded, and not prominent as 

 inM. capitata, Gruer. Pectus broadly yellow, dusky on the middle 

 and posteriorly. Coxae and legs pale testaceous ; the posterior 

 legs dusky above, and fulvous on the middle of the tibiae. Scu- 

 tellum dusky, mostly concealed by the pronotum. Wing-covers 

 black, bluntly rounded at tip. Abdomen black above, tinged with 

 lead-colour and a little sericeous beneath, the latei-al margins 

 broadly fulvous ; the venter has sometimes a row of fulvous dots 

 ach side. 



Length to tip of abdomen l|-2 millim., to end of wing-covers 

 2\ millim. ; width of pronotum | millim. 



Several specimens, both winged and unwinged, were collected 

 by Mr. Smith in the pools of cool water at various localities on 

 the island. 



3. Observations on the Refraction and Vision of the Seal^s 

 Eye. By G. Lindsay Johnson, M.D., F.Z.S. 



[Eeceiyed November 21, 1893.] 



In the course of my investigations on the vision of the Mam- 

 maha, I was particularly struck with certain peculiarities in the 

 eye of PJioca vituUna, the Scotch Seal, so frequently met with off 

 our northern coasts. The eye, as everyone must haye observed, is 



