466 NORTH AMERICAN DIPTERA 



Black, the antennae, coxae and base of the abdomen on the broad sides, 

 yellow; apex of abdomen red; pollen of the head white, of the me- 

 sonotum cinereous yellow, a broad brown fascia immediately behind the 

 suture; abdominal segments narrowly white pollinose basally. Length, 

 7 mm. Genotype: — C fasciata, n. sp. (Panama). 



Schwarzalia, new genus 



Female. — Arista long plumose; parafaeials with short, fine hair; 

 front of moderate width, with two pairs of orbitals; ocellars long; outer 

 verticals weak; cheeks wide; face retreating, the oral margin produced; 

 ridges bare; proboscis short; palpi scarcely clavate; antennae practically 

 reaching the oral margin. Acrosticals weak, 3-1; dorsocentrals 2-3; 

 posterior sublateral and posthumeral bristle absent; two sternopleurals; 

 prosternum bare; infrasquamal setulae present. Apical cell ending 

 a little before the wing-tip; third vein bristled half way to the 

 anterior crossvein; first vein bristled on whole length. Abdomen elong- 

 ate oval, without discals, the first segment without marginals. Black, 

 the palpi, coxae, femora mostly, liumeri and basal half, or less, of the 

 abdomen yellowish-red; head and the broad bases of the abdominal 

 segments white pollinose; thorax cinereous pollinose, mesonotum . with 

 a broad black band behind the suture. Length, 7.5 mm. Genotype: — 

 S. luteipennis, n. sp. (Panama). 



Tachinalia, new genus 



Female. — Robust, the abdomen broader than the thorax and not 

 much longer than wide. Eyes with long hair; parafaeials haired; front 

 rather narrow, with two pairs of orbitals; ocellars long, outer verticals 

 absent; cheeks wide; face retreating, the oral margin produced; ridges 

 bare; proboscis short; palpi slightly clavate; antennae reaching the 

 lowest fifth of the face; arista bare. Acrosticals 2-3; dorsocentrals 3-3; 

 posterior sublateral absent; posthumeral present; sternopleurals 2-1; 

 prosternum bare; scutellum with many spinose bristles. Apical cell 

 ending moderately before the wing-tip; third vein bristled basally. 

 Abdomen almost wholly covered with spinose bristles. Head with 

 cinereous pollen, thorax thinly pollinose; scutellum reddish, abdomen 

 castaneous. Length, 10 to 11 mm. Genotype: — T. hispida, n. sp. 

 (California). 



