WALKEK ON DIPTERA OF AEU ISLANDS. 117 



verse ; halteres white. Length of the body 3^ lines ; of the wings 

 6 lines. 



Gen. Beea, n. g. 



Platystomae affinis. Fades lata. AntennoB breves; artieulus tertius 

 longiconicus ; arista nuda. Femora intermedia inerassata, denticulata. 



Allied to Platy stoma. Face broad ; antennae short, third joint elongate- 

 conical; arista bare; middle femora incrassated, denticulated beneath. 



137. Brea discalis, n. s. Mas. Nigra; capite testaceo apud oculos 

 albido, fronte ochracea ; antennis piceis basi rufescentibus ; thorace 

 vitta lata cana ; abdomine fulvo, disco nigro cupreo ; pedibus fulvis, 

 femoribus anticis apice tibiisque antieis basi nigris ; alis sublimpidis, 

 fascia media lata postice abbreviata guttam limpidam subcostalem 

 includente lineaque transversa exteriore nigricantibus ; halteribus 

 testaceis. 



Male. Black. Head testaceous, whitish about the eyes, front ochra- 

 ceous ; antennae piceous, reddish at the base ; thorax with a broad 

 hoary stripe ; abdomen tawny, with a blackish cupreous disk ; legs 

 tawny, fore femora at the tips and fore tibiae at the base black ; wings 

 nearly limpid, with a broad middle blackish band, which is abbre- 

 viated hindward and includes a limpid dot by the costa, and has 

 beyond it a blackish transverse line ; veins black, testaceous towards 

 the base ; discal transverse vein straight, upright, parted by half its 

 length from the border, and by much more than its length from the 

 prsebrachial transverse; halteres testaceous. Length of the body 

 4 lines ; of the wings 7 lines. 



138. Brpa contraria, n. s. Mas et Fcem. Nigra ; capite fulvo apud 

 oculos albido, fronte ochracea ; antennis rufescentibus ; thorace vitta 

 cana ; abdomine purpureo apice cyaneo ; pedibus nigris, femoribus 

 anticis tarsisque testaceis ; alis sublimpidis, fascia lata media postice 

 abbreviata, guttis interioribus lineaque transversa exteriore nigri- 

 cantibus. 



Male and Female. Black. Head tawny, whitish about the eyes; an- 

 tennae reddish ; thorax with a hoary stripe ; sides and pectus also 

 hoary ; abdomen purple, blue towards the tip ; legs black ; tarsi and 

 fore femora testaceous ; wings nearly limpid, with a broad blackish 

 middle band which is abbreviated hindward, with some interior blackish 

 dots, and with an exterior transverse blackish line; veins black; 

 discal transverse vein straight, parted by less than half its length from 

 the border, and by less than its length from the prsebrachial trans- 

 verse ; halteres black. Length of the body 3-3| lines ; of the wings 

 6-7 lines. 



Gen. Adeama, n. g. 



Mas. Corpus longiusculum. Caput thorace vix latius, setis duabus 

 posticis erectis. Aniennce sat lougae ; artieulus tertius linearis, apice 



