246 CHARLES W. JOHNSON. 



Stratioiuyia pingiiis Walker. 



Striitioniys piiHitiin Walker. Trans. Eiit. Soc. n. ser. v, 270. 

 9 . — Blackish. Head with ferruginous tomentum above witii whitish pubes- 

 cence in front; hind side with silvery tomentum. Antennte black ; third joint 

 lanceolate towards the tip, much longer than the first. Thorax with ferruginous 

 tomentum and with ferruginous stripe along each side; scutellum with two fer- 

 ruginous sidnes. Abdomen with bands of slightly gilded tomentum on the bor- 

 ders of each segment ; underside with bands of whitish tomentum, which are 

 dilated on each side, and with a broad, tawny, discal stripe. Femora and tibise 

 beneath and tarsi, tawny. Wings vitreous, lurid along the costal from the base 

 to nearly two-thirds its length. Length 6 lin. ; wing 12 lin. 



Mexico. 



Strationiyia !!»iiball>a Walker. 



Stratiomys snb(i]bu Walker, List, etc., v, 43. 



? StraMomt/s suhalbn. Bellardi, Saggio, etc., i, 31; Osten Sacken. Biol. Cent.- 

 Amer. Dipt. 36. 

 " Male. — Black, clothed beneath with silvery down. Antennae nearly twice the 

 length of the head; first joint tawny towards the base, nearly six times the 

 length of the second ; flagellum elongate-fusiform ; scutellum tawny along the 

 hind border, with two testaceous spines. Abdomen with two interrupted whitish 

 bands, one on the second, the other on the third segment; underside pale green, 

 with silvery tomentum. Legs tawny ; femora black. Wings limpid, narrow, 

 dark brown in front ; halteres white. Length of body 3 lines ; wing 6 lines. 



"Para. From Mr. Bates' collection (AValker)." 



" Male. — Black, vittae white. Head broad, eyes near the base of the front con- 

 tiguous; front small, triangular, black, with yellow pile. Antennae long, black; 

 first joint yellow, near the apex black ; face prominent, carinate, black, shining, 

 with sparse white pile; palpis flavis; proboscis black. Thorax subquadrate, 

 black, tomentum rather long, yellow, a pale spot between the base of the scutel- 

 lum and base of the wing; scutellum black, bispinose; spines yellow, short; 

 pleurae and pectus black, with white pile ; halteres yellow, knob green. Abdo- 

 men subquadrate, black ; second and third vittae near the posterior margin ; vittae 

 rather broad, interrupted in the middle, white; lateral margin of the second, 

 third and fourth segments yellowish; venter yellow, with silvery tomentum. 

 Legs black and yellow ; femora black ; tibiae and tarsi yellow. Wings yellowish, 

 towards the posterior margin broadly hyaline, and the anterior margin fuscous. 

 Length 8 mm. ; length of wings 16 mm." 



Tampico, Mex. (de Saussure). Bellardi 'Baron Osten Sacken 

 (Biol. Centr.-Amer. Dipt. 86) refers to this species as follows : 



" I cannot believe that this species is merely a variety of S. mnta- 

 bile, besides the very considerable difference in the coloring of the 

 body and wings (the costal half of which is uniformly brown). Tlie 

 abdomen is squarer and flatter than in the male of that insect. 

 Schiner (Reise d. Novara Dipt. p. 61) speaks of varieties of S. mu- 

 tabilis with the costal half of the wing uniformly brown ; and Arri- 



