320 DIPTERA OF NORTH AMERICA. [PART II. 



grayish ; veins black ; fore-branch of the praebrachial vein obtusely 

 rectangular ; discal transverse vein oblique, almost straight ; hal- 

 teres black. Length of the body 2 lines ; of the wings 4 lines. 

 Mexico. 



Page 287. Psilopus haereticus. 



Fcem. Purpureo-niger, latus, nitens, subtus albido-tomentosus, 

 capite, antennis pedibusque nigris, abdomine nigricante purpureo, 

 alis subcinereis, venis nigris. 



Female. Purplish-black, broad, shining, with whitish tomen- 

 tum beneath ; head, antennae and legs black, the latter rather 

 stout ; thorax rather thickly beset with black bristles ; abdomen 

 blackish-purple ; wings slightly grayish ; veins black ; fore-branch 

 of the prsebrachial vein rectangular, but with the angle somewhat 

 rounded ; discal transverse vein oblique, nearly straight. Length 

 of the body 1| line ; of the wings 3^ lines. 



Mexico. 



Page 288. Psilopus permodicus. 



Mas. Aureo-viridis, gracillimus, antennis pedibusque flaves- 

 cente albis, alis limpidis, venis halteribusque pallidis. 



Male. Golden-green, very slender ; antennae and legs yellowish- 

 white ; wings limpid ; veins pale ; fore-branch of the prsebrachial 

 vein obtusely rectangular ; discal transverse vein oblique, straight ; 

 halteres very pale. Length of the body If line ; of the wings <* 

 lines. 



Mexico. 



