60 WALKER OF DIPTEEA OF ABTJ ISLANDS. 



stripes ; abdomen beneath pieeous, testaceous at the base ; femora 

 and tibiae with broad black bands ; wings greyish, stigma and veins 

 black ; halteres testaceous. Length of the b^dy 4 lines ; of the 

 wings 72 lines. 



11. Stratiomys nexura, U.S. Mas et Foem. Nigra, antennis basi 

 fulvis, capite transverso brevioribus, abdominis lateribus, ventre, 

 tibiis, tarsis halteribusque fulvis, alis limpidis, venis testaceis. Mas. 

 Thorace atro piloso. Foem. Thorace nigro-aeneo angustiore. 



Male and female. Black. Head rather prominent ; antennae tawny 

 towards the base, shorter than the breadth of the head ; spines of 

 the scutellum, abdomen beneath, tibiae, tarsi, and halteres tawny ; 

 wings limpid, veins testaceous. Male. Thorax deep black, pilose; 

 abdomen tawny along each side. Female. Head shining; thorax 

 aeneous black, narrower than that of the male ; abdomen with the 

 tawny stripes much narrower than those of the male. Length of the 

 body 3| lines ; of the wings 6^ lines. 



Gren. Clitellaeia, Meigen. 



12. Clitellaria bivittata, Fahr. See Vol. I. p. 7. 



Gen. Gabaza, n. g. 



Fcem. Corpus breve, latum. Caput transversum, thorace paullo an- 

 gustius ; facies valde obliqua. AntenncB capite transverso breviores ; 

 articuU breves, transversi ; arista longa, gracihs, filiformis. Scutellum 

 promiuens, spinis duabus minutis. Abdomen transversum, thorace 

 multo latius. Pedes graciles, breviusculi. Alee sat angustae; venae 

 tenues. 



Female. Body short, broad. Head transverse, a little narrower than the 

 thorax ; face very oblique. Antennae shorter than the breadth of the 

 head ; joints short, transverse ; arista slender, filiform, longer than 

 the preceding part, which is lanceolate. Scutellum prominent, armed 

 with two minute spines. Abdomen transverse, much broader than 

 the thorax. Legs slender, somewhat short. Wings rather narrow ; 

 veins feeble, in structure like those of Stratiomys. 



13. Gabaza argentea, n. s. Foim. Nigra, antennis fulvis, arista 

 alba, thorace abdomineque argenteo-tomentosis, tarsis albido-testa- 

 ceis, ahs limpidis, venis pallidis. 



Female. Coal-black. Antennae tawny, arista white; thorax and ab- 

 domen with bright silvery tomentum; tarsi whitish testaceous; 

 wings limpid, veins pale. Length of the body 2 lines ; of the wings 

 3^ lines. 



Gen. Saegus, Fabr. 



14. Sargus metallinus, Fabr. See Vol. I. p. 1 10. 



