NORTH AMERICAN DIPTERA. 253 



Ofloiitoiiiyia riifipes Locw. 



Odontomyia rnfipes Loew, Centur. vi, 25, % . 

 Odontomyia scalaris Loew, Centur. vi, 2G, J . 



Length '^11 mm. — Head totally black ; first two joints of the antennte brown- 

 ish black, subequal (third in the specimen described wanting). Face moderately 

 proTuiuent, convex, obtusely carinate, with whitish pile, proboscis black. Thorax 

 totally black, with long whitish pile; on the pleurte white and shaggy ; scutellum 

 yellow, base black. Abdomen yellow, with a medial stripe, on the anterior mar- 

 gin of the second segment dilated, the following segments with a single basal 

 band wholly black ; venter totally yellow. Legs reddish yellow ; posterior tarsi 

 in this specimen wanting. Wings pure hyaline, vein bright yellow ; third longi- 

 tudinal vein branched, discal cell emits two veins. 



Length 9 11 mm. — Head yellow, occipital disc and an irregular vertical spot 

 black ; first two joints of the antennte brownish black, subequal (third wanting). 

 Face moderately prominent, convex, very obtusely carinate, pile white, medial 

 stripe black ; dorsal ])ortion of the thorax black, golden pubescence, lateral mar- 

 gins with a wide border that extends from the humeri to the suture and the pos- 

 terior angles yellow ; pleurse yellow, marked with black, pile white, pectus and 

 metanotum black ; scutellum totally yellow. Abdomen yellow, with a medial 

 stj'ipe ; second and the following segments with a single anterior band of black ; 

 venter totally yellow. Legs reddish yellow ; apex of the posterior tarsi brown. 

 Wings pure hyaline, veins bright yellow, third longitudinal vein branched, discal 

 cell emits two veins. 



Cuba ( Guild lach) Loew. 



That these two descriptions apply to the same species as Mr. Loew 

 suggests, there is not the slightest doubt. 



Odontomyia cincta Olivier. 



O(lo)ifomi/)(i cincta Oliv., Encycl. Metli. viii, 432, 3; Macquart, Dipt. Exot. i, 

 2, 189 ; Day, Proc. Acad. Nat. Sci. Phila. 1882, 87. 



Rratiomys cincta Walker, List, etc., v, 39. 



Odontomi/iu extremis Day, Proc. Acad. Nat. Sci. Phila. 1882, 80; Williston, 

 Can. Ent. xvii, 128. 

 Length % 9 12 mm. % . — Face and frontal triangle light green, with whitish 

 pile; vertical triangles and the proboscis black, ocelli yellow. Antennae red, tip 

 black. Thorax black with yellowish pile; lateral margins, scutellum and pleune 

 green ; basal centre of the scutellum black, spines yellow, tips brown, pectus 

 black. Abdomen green, with a wide, irregular dorsal line of black, contracted at 

 the posterior edge of the second and third segments, forming a triangular, or a 

 keystone-shaped marking, that on the fourth square, and that on the fifth not 

 reaching the posterior margin, and laterally attenuated to the margin ; venter 

 green. Legs yellow, three terminal joints of the tarsi. Wings hyaline, veins 

 yellow; discal cell emits three veins, third longitudinal vein branched. 



9 . — Face, front and occiput green, shining; frontal orbits with a prominent 

 black sijot; ocellar triangle black; in some specimens the black is laterally ex- 

 tended, and in one this is narrowly connected with the spots on the frontal orbits ; 

 the lateral strip of the thorax wider than in the male, and the tomentum golden 

 yellow; scutellum totally green. Abdomen green, with a series of black dor.sal 

 triangles : in some there are laterally extended on the second and third .segments 



TKANS. AM. ENT. SOC. XXII. JULY. 1895. 



