ART. 11. FLIES OF THE FAMILY CLUSIIDAE- — MELANDER AND ARGO. 7 



6. APIOCHAETA LIMBIPENNIS Rondani. 



Peratochaetus limbipcnnis Rondani, Arch, di Caneatrini, p. 43 (18G3). 

 Apiochaeta limbipennis Czerny, Wien. ent. Ztg., vol. 22, p. 99 (1903). 



Yellowish, an ocellar spot black; arista nearly bare; no turn with 

 four vittae, the inside pair extending into sides of scutellum, the out- 

 side pair extending into pleurae to the me ta thorax; abdomen tipped 

 with black; legs brownish; halteres luteous; wings yellowish hyaline, 

 the front margin, apex broadly, posterior crossvein, base posteriorly 

 and sixth vein bordered with blackish; 4 mm. 



Habitat. — Chile. 



4. Genus CHAETOCLUSIA Coquillett. 



C/jae^ocZitsw CoQUiLLETT, Proc. Ent. Soc. Wash., vol. 6, p. 93(1904). — Malloch 

 Proc. Ent. Soc. Wash., vol. 20, p. 5 (1918). 



Three fronto-orbitals, the front pair convergent, no cruciate or 

 postvertical bristles, ocellars small; no pro thoracic, two dorsocentrals, 

 no prescutellars ; preapicals present; lunule covered; first vein setose. 



Genotype. — C. halt'eri Coquillett, the original species. The bristly 

 first vein is the striking character of this genus. 



KEY TO THE SPECIES OF CHAETOCLUSIA. 



1. Arista densely plumose 2 



Arista finely pubescent or plumose; wings dark except at base 3 



2. Thorax wholly yellow; wings yellowish hyaline; front tibiae and tarsi brown; an- 



tennae yellow. (New Jersey.) afflnis Johnson. 



A horseshoe-shaped black mark around root of wing, notum bivittate; wings with 

 central and apical vague clouds; posterior tibiae broAvnish basally; antennae 

 with brown apex. (C. Amer.) bakeri Coquillett. 



3. Pleurae yellow; legs yellow; notum marked with black or brown stripes 4 



Sternopleura with jet black circular spot; legs apically brownish; antennae luteous; 



notum yellow, a small spot between wings and scutellum. (Hayti) 



nigromaculata, new species. 



4. Notum black on the sides from and including humeri to the posterior margin; 



antennae yellow. (W. Ind.) xanthops Williston. 



Notum quadrivittate ; thii'd antennal joint black or brown above 5 



5. Femora not setose beneath; markings of body black; first vein with about 12 setulae. 



(Costa Rica) quadrivittata, new species. 



Front and middle femora with comb of setae beneath; markings brown; first vein 

 with about 6 setulae. (Costa Rica) longefilata, new species. 



7. CHAETOCLUSIA AFFINIS Johnson. 



Chaetodusia affinis Johnson, Psyche, vol. 20, p. 101 (1913). — Malloch, Proc. 



Ent. Soc. Wash., vol. 20, p. 5 (1918). 

 Clusia Jlava Johnson, in part, New Jersey List (1899). 



Male. — Head light yellow, palpi and antennae yellow, arista black, 

 densely plumose, ocelli black. Thorax yellow, abdomen brownish, 

 tip yellow. Legs yellow, anterior tibiae and tarsi brown. Halteres 

 yellow. Wings yellowish hyaline. Length 2.5 mm. 



