Mr. T. V. Wollastoii on undescribed Madeiran Insects. 115 



Limnobia Atlantica. 



L. pallide flavo-fusca, gracilis ; antennis palpisque vix obscurioribus ; 

 thorace in disco abdominisque apice dilutioribus ; pedibiis longis 

 gracilibus, femoribus, tibiis tarsisque ad apicem ipsum nigrescenti- 

 bus ; alis breviusculis, Isete submaculatis. — Long. corp. 3-3^, alar. 

 5i lin. 



Inhabits Porto Santo. 



Genus Pachyrhina, Macq. 



Pachyrhina brevipennis. 



P. flava ; capitis vitta, antennis palpisque nigris ; thorace fusco- 

 trivittato ; abdomine nigro, segmentis antice flavis ; alis abbre- 

 viatis, subcinereis. — Long. corp. 8^, alar. S^ lin. 



Inhabits Madeira proper, occurring in moist spots of a lofty 

 altitude. In July 1850 it was not uncommon at the Cruzinhas. 



Genus Thereva, Lat. 



Thereva nana. PI. V. fig. 3. 



T. fusco-cervina ; capite cano, antennis nigris ; abdomine fusco, 

 fasciis, apice pedibusque testaceis ; alis fulvescentibus, halteribus 

 pallidis. — Long. corp. 2f, alar. 5 lin. 



Inhabits the Dezerta Grande, on which island I captured it at 

 the end of May 1850. 



Fam. SYRPHID^. 



Genus Eristalis, Lat. 



Eristalis ustus. 



E. piceus, fusco-hirtus ; abdominis basi fulvo interrupte fasciata ; 

 antennis pedibusque nigris; tibiis basi fulvis ; alis cinereis. — 

 Long. corp. 7, alar. 14 lin. 



Inhabits Madeira proper. 



Genus Paragus, Lat. 

 Paragus mundus. PI. V. fig. 4. 



P. nigro-chalybeus ; epistomate testaceo ; antennis nigris; pedibus 

 albidis, femoribus basi nigris, tibiis ad apicem tarsisque luteis ; 

 alis hyalinis. — Long. corp. 2^, alar. 4^ hn. 



Inhabits Madeira proper (Sao Vincente, Ribeiro Frio, near 

 Funchal, &c.), and Porto Santo. 



8* 



