from the Island of St. Vincent. 201 



common, for Mr. Hutton informs me that he saw at least 200 

 specimens, of which only one was alive. 



(Subfam. Ofatrides.) 

 Genus Halonomus (nov. gen.). 



Corpus sat parvum, breviter ovale, convexum : fronte ad latera 

 leviter elevata, ad apicem biloba ; oculis antice valde emarginatis : 

 pi'othorace transverse, antice leviter emarginato, postice bisinuato, 

 angulis posticis paulo productis sed baud acutis, ad latera rotundato 

 anguste explanato : scntello magno triangular! : sternis abdomineque 

 fere ut in Opatro, sed lobo j)rosternali borizontali (nee deflexo, ad 

 apicem ipsum etiam suberecto) et paulo magis producto necnon rneso- 

 sterno antice argute triangulariter excise (nee mere concave) : ehjtris 

 liberis : alis magnis. Antennas capitis protboracisque longitudine, 

 basi graciles, apicem versus subclavatse, articulo 1™° sat robusto, 

 2''° paulo breviore, 3*'° primi longitudine, 4*°, 5"", 6'° longitudine 

 decrescentibus, reliquis latitudine crescentibus, fere clavam elengatam 

 laxam minus abruptam 5-articulatam efficientibus (ultimo breviter 

 subovate). Lahrum tenue, subqnadrato-transversum, angulis anticis 

 rotundatis ciliatis, apice integrum. Mandibulce validae, cornese, tri- 

 angulares, apice inflexje et obscure bifidse, intus in medio fisso-sinuatse 

 coriacese. MaxiUce breves, bilobse : lobo externo pubescente, setoso ; 

 interno leviter inflexo, biuncinato, intus versus apicem fortiter pecti- 

 nate-setoso. Palpi maxillares longissimi, articulo 1"'° parvo flexueso, 

 2'^° elongate clavato, 3*'° breviore, ultimo magno securiformi : labiates 

 breviores, articulo 1""° sat parvo, 2'^" majore crassiore clavato, ultimo 

 hoc majore crassiore elongato-ovato apice acuminate. Mentum, 

 transverse- quadratum, postice gradatim paulo angustius, antice late 

 sed baud profunde emarginatum. Ligula ad basin tegumente albido 

 ceriaceo cennexive cum mente cenjuncta, in tote rotundato-ovata, sed 

 vere nisi faller veluti e duplici parte formata, alia sc. supera media 

 cornea angustula ad apicem valde setesa et ibidem triangulariter 

 excisa, alia infera multo latiere minus rebusta (apice etiam mem- 

 branacea pubescente) illam omnino superante. Pedes subgraciles : 

 tibiis setuloso-pubescentibus, anticis vix dilatatis, sed ad angulum 

 externum in denticulum spinifermem plus minus exstantem productis : 

 tarsis\\Qt^vova.Qvh,posterioribus (sed praesertim JJ05^l!c^.s) articulo 1""° 

 lengiusculo. 



Obs. Genus affinitate baud longe ab Opatro distans, sed species 

 breviores (ovales) minus sculpturatse ac magis convexse sunt ; insuper 

 pedibus minus robustis, tibiis anticis baud dilatatis et ad angulum 

 externum in spinam parvam dentiformem productis, antennis paulo 

 magis clavatis, labro apice integro, lobe prosternali baud deflexo 

 (etiam ad apicem ipsum suberecto), mesosterno antice triangulariter 

 excise, necnon structura ligulfc et menti tote ccelo ab Opaf.ris omni- 

 bus recedunt. Ilalonomi in locis valde salinis, nisi faller, sells 

 habitant. 



Ab aXs, sal, et rc/io, cole. 



The insect from which the above characters have been com- 

 Ann.^ Mag. N. Hist. Ser.3. Fo/.vii. 14 



