FAMILY TACHINID.^ — THE TACHINIDS 465 



Corozalia, new genus 



j\Iale. — Eyes haired; front moderately narrow, without orbitals or 

 oeellars; outer verticals absent; cheeks narrow; face moderately retreat- 

 ing, the oral margin produced; facial ridges bare; antennse reaching 

 lowest fifth of face, the second segment somewhat less than half as long 

 as the third; arista practically bare; proboscis short; palpi clavate. 

 Acrostieals and dorsocentrals 3-3, the posterior acrosticals close to the 

 suture; posterior sublateral present; posthumeral absent; sternopleurals 

 2-1; infrasquamal setula? present. Anterior tibiae with one long posterior 

 bristle. Apical cell ending moderately before the wing-tip ; third vein 

 with two basal bristles. Abdomen elongate, tapering, with paired 

 discals; first segment with marginals. Black, with cinereous pollen, 

 the mesonotal pollen sometimes with yellowish tinge, with narrow, dis- 

 tinct vittte; apical half of abdominal segments bare. Length, 8 to 10 

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



Chaetonalia, new genus 



Male. — Head almost twice as high as long; cheeks very narrow; face 

 and front narrow; no orbitals; oeellars very small and hair-like; outer 

 verticals not developed; face slightly receding below% the ridges bare; 

 antenna? long, the second segment short; arista short plumose on basal 

 half; proboscis short; palpi slightly clavate. Acrosticals 1-1; dorso- 

 centrals 2-3; posterior sublateral and posthumeral absent; two sterno- 

 pleurals; infrasquamal setulre present. Apical cell ending a little before 

 the apex of the wing; third vein with two basal bristles. Abdomen 

 with paired discals; first segment with pair of marginals. Pollen cinere- 

 ous yellow, yellow on the front; mesonotum strongly quadrivittate; 

 abdominal segments with about the apical half bare. Jjength, 5.5 mm. 

 Genotype: — C. lateralis, n. sp. (Panama). 



Canalia, new genus 



Female. — Front rather narrow; two pairs of orbitals; oeellars long; 

 outer verticals .strong; cheeks very narrow; face gently receding, the 

 oral margin slightly produced; ridges bare; proboscis short; palpi very 

 slightly clavate; antennge reaching almost to the vibrissa, the second 

 segment short; arista short plumose. Acrosticals 2-1; dorsocentrals 2-3; 

 posterior sublateral and posthumeral bristle absent; two sternopleurals; 

 infrasquamal setulie present; prosternum haired. Wings tinged with 

 brown, especially toward the apex; apical cell ending a little in front 

 of the wing-tip: third vein bristled to the anterior crossvein. Abdomen 

 elongate oval, without discals, the first segment without marginals. 



