FBOM XEW GUINEA. 119 



longer than the thorax ; apical half piceous. Legs very robust ; 

 femora with minute black spines beneath ; tibiae and tarsi black. 

 Wings cinereous ; veins black, bordered with brown, ochraceous to- 

 wards the base ; praebrachial vein abruptly curved towards the cubital 

 vein, which it joins at some distance from the tip of the latter ; discal 

 transverse vein straight, parted by one-fourth of its length from the 

 border, and by more than its length from the praebrachial transverse 

 vein ; alulaj very large, dingy whitish, ochraceous-bordered. Length 

 of the body 4^ lines ; of the wings 9 lines. 

 Thia species may form a new genus. It differs from Lampro- 

 gaster in the structure of tlie mouth and of the vring-veins. The 

 latter character indicates that its flight is powerful. The trans- 

 verse suture of the thorax is as complete as that of the Tachinides, 

 and it resembles that subfamily in the large size of the alulae. 



Gen. AcHiAS, Fair. 



47. ACHIAS BRACHYOPHTHALMA. Foswi. Testacca, vertice ochraceo 

 fascia atomaria nigra antice excavata, facie albida piceo marginata 

 strigis duabus lateralibus nigris, antennis fulvis, thorace vittis quatuor 

 abbreviatis piceis, scutello nigro, abdomine segmentorum marginibus 

 posticis styloque apicali piceis, tibiis tarsisque nigris, alis cinereis vitta 

 costali fusca lurido varia. 



Female. Testaceous, broad, thick. Head a little broader than the 

 thorax ; vertex ochraceous, with a black speckled band which is ex- 

 cavated in front ; face whitish, bordered with piceous ; facialia very 

 broad ; two black exterior lanceolate streaks. Eyes very prominent. 

 Antennae tawny ; third joint linear, more than twice the length of the 

 second ; arista plumose. Thorax with cinereous tomentum and with 

 four piceous stripes, of which the inner pair are most abbreviated ; 

 scutellum black. Abdomen oval, hardly longer than the thorax, with 

 a slender apical piceous style ; hind borders of the segments piceous. 

 Tibiae and tarsi black. Wings cinereous, with a brown partly lurid 

 costal stripe; veins black; discal transverse vein almost straight, 

 parted by one-fourth of its length from the border, and by much 

 more than its length from the obhque black-clouded praebrachial 

 transverse vein. Length of the body 6 lines ; of the wings 12 lines. 

 This species exhibits the transition between Achias and Lam- 



progaster, if it does not obliterate the distinction between the two 



genera. 



48. Achias venustula. Mas. Fulva, capite testaceo macula rotunda 

 nigra, oculis extantibus, abdomine viridi cupreo purpureoque micante 

 basi subtusque testaceo, tarsis nigris, alis limpidis vena transversa 

 discali fusco nebulosa. 



Male. Tawny. Head pale testaceous, a little broader than the thorax, 

 with a round black spot between the eyes ; face deeply impressed on 



10* 



