NORTH AMERICAN DIPTERA. 245 



!$tratioinyia Gerstaeckeri Bellardi. 



Straliomys Gerstaeckeri Bellardi, Saggio, etc., i, 31, tab. 1, fig. 10. 

 '^ . — Black, with greenish stripes. Head broad, eyes naked and contiguous near 

 base of front, ocelli yellow, front triangular, black, with yellowish pubescence. 

 Antennse long, black, base of the first yellowish, face very prominent, black 

 shining; pubescence whitisli, with two yellow spots near the orbits, the upper 

 one near the base of the antenuse the lower one on the inferior orbits ; apex of 

 the epistoma marked with yellow ; palpi yellow, proboscis black. Thorax sub- 

 quadrate, black, pubescence yellow, posterior with two greenish markings ; pleuriB 

 and pectus with whitish pile; scutellum black, spines yellow, halteres green, base 

 brown. Abdomen subquadrate, depressed, black, somewhat naked, pile yellow, 

 obsolete, margins greenish yellow, second and third with a band at the posterior 

 margin band small and not interrupted ; venter green tomentose, silvery. Legs 

 brownish black ; femora very black, tibise and tarsi obscure yellow; apex of the 

 tarsi brown. Wing, anterior margin broadly, densely fuscous, postei'ior margin 

 hyaline. Length 7 mm. ; wings 18 mm. 



Mexico (Salle), Bellardi. 



This specie.s, on first appearance, seems related to Stratiomyia sub- 

 alba Walker, but the bands on the second and third segments are 

 not interrupted. 



Stratiomyia biiiiaciilata Bellardi. 



Strafiorm/s himacidata Bellardi, Saggio, etc., App. 10. fig. 7. 

 % . — Black, with two whitish spots. Head broad, eyes near the base of the 

 front contiguous ; front small, triangular, black, below with yellowish silvery pu 

 bescence. above with black pubescence. Antennae very long, black; base of the 

 first joint yellowish, face prominent, middle longitudinally carinate, black, shining 

 with thin whitish pubescence ; palpi brown, near apex yellow, proboscis black. 

 Thorax subquadrate, slightly convex, black ; tomentose somewhat dense and yel 

 lowish brown, a green spot between the base of the wing and scutellum ; scutellum 

 black, spines short, black, and near the apex, yellowish : pleui-ae and pectus black, 

 with whitish pubescence ; halteres green, near the base yellow. Abdomen sub- 

 quadrate, depressed, black, tomentose brown ; second segment with two large, 

 greenish white spots, contiguous with the posterior margins of the segments and 

 curved anteriorly, middle stripe small; venter white, silvery tomentose. Legs 

 brownish black, all of the femora black ; tibise and tarsi reddish yellow. Wings 

 small, rather long, anterior broadly stained with black, near the posterior margin 

 clouded. Length 11 mm. : wings 20 mm. 



Cosamaloapam, Mexico (Salle), Bellardi. 



Donbt.fid and Undetermined Species. 



Stratiomyia coiistricta Walker 



Ktrtttiomys constricta Walker, Trans. Ent. Soc. n. ser. v, 268. 

 % . — Deep black. Head with slightly silvery tomentum in front and with gray 

 pubescence beneath and behind ; scutellum with two piceous spines. Abdomen 

 piceous at the tip, and with a band of slightly silvery tomentum on each seg- 

 ment; tarsi and hind tibiie tawny. Wing lurid at base, dark brown from thence 

 to more than half the length, vitreous and colorless toward the tip. Length 6 

 lin. ; wings 12 liu. 



Mexico. 



TRANS. AM. ENT. SOC. XXII. JULY, 1895. 



