CIST OF DIPTERA. 623 



22. Erax invarius. 

 Eras invarius, Diptera Saundersiana, Pt. 2, 131. 

 Jamaica. 



23. Erax rdfitibia. 



Foern. Ater ; mystax niger, albido mixtus ; thorax albo linea- 

 tus ; abdomen incisuris lateribusque cinereis, tegmenta ul- 

 timo albo ; tibice fulvce ; alee flavescentes. 



Erax rufitibia, Macq. Dipt. Exot. Suppl. 3, 27, 42, pi. 2, f. 11. 



St. Domingo. Rio Negro. 



24. Erax fortis. 



Mas. Niger, cinereo tomentosus ; caput subtus albidum alboque 

 pilosum ; mijstax albo pilosus, setis nonnullis superioribus 

 nigris ; thorax vittis tribus lalis nigris ; abdominis segmenta 

 posteriora marginibus posticis testaceis ; tibite fulvce, apice 

 nigra ; tarsi subtus rufescentes ; aim limpidce, apices versus 

 su bf usees ce rites. 



Male. Black, with cinereous tomentum. Head whitish and 

 thickly clothed with white hairs beneath. Mystax white, excepting 

 a few black bristles on the higher part. Thorax with three broad 

 black stripes, the lateral pair interrupted. Fourth, fifth and sixth 

 abdominal segments with testaceous hind borders. Legs with 

 white hairs, and with black and white spines; tibiae tawny, with 

 black tips; tarsi piceous at the base, reddish beneath. Wings lim- 

 pid, very slightly brownish towards the tips and along part of 

 the bind borders ; veins black, tawny towards the base. Halteres 

 tawny, with blackish knobs. Length of the body 7 lines ; of the 

 wings 9 lines. 



a. St. Domingo. From Mr. Hearne's collection. 



25. Erax Haitensis. 



Mas. Ater; mystax albus ; thorax lineis cinereis ; tibice fulvce ; 

 alee Jlavescentes, maris dilatatce, vence cubitalis furca antica 

 simplici. 



Erax Haitensis, Macq. Dipt. Exot. Suppl. 3, 28, 45, pi. 2, f. 10. 



St. Domingo. 



