284 Mr. F. Walker's Characters of iindescrihed Diptera 



black bristles; proboscis and antennse black; thorax with a broad 

 blackish stripe, including a slender cinereous stripe; abdomen 

 with a broad black band on the fore-border of each segment, 

 wholly pale cinereous towards the tip ; legs very stout, with pale 

 cinereous hairs and black spines ; wings cinereous, extending 

 very little beyond the tip of the abdomen ; veins black ; fore-fork 

 of the cubital vein forming a nearly right angle, which emits a 

 short branch ; halteres whitish, with tawny knobs. 



Length of the body 8g lines ; of the wings 14 lines. 



Mexico. 



Genus Damalis, Fabr. 



Damalis signntus. 



Fcem. — Testaceus, capite nigricante, epistomate piano, setis 

 quatuor nigris, antennis nigris, thoracis disco nigro valde 

 convexo, abdominis maculis lateralibus apiceque nigris, pe- 

 dibus fulvis validis nigro-setosis, femoribus posticis nigro- 

 spinosis, alis vitreis sub-luridis, venis nigris basi et apud 

 costam testaceis. 



Female. — Testaceous : head blackish, testaceous about the base 

 of the proboscis ; epistoma quite flat, with four black bristles ; 

 antennae black ; thorax very convex, its disk black ; abdomen 

 black towards the tip, and with a row of black spots on each side ; 

 legs tawny, stout, with black bristles ; hind femora with black 

 spines ; wings vitreous, with a slight lurid tinge ; veins black, 

 testaceous at the base and along the costa. 



Length of the body 4 lines ; of the wings 9 lines. 



Burmah. 



Fam. LEPTID^. 



Genus Chrysopila, Macq. 



Chrysopila trifasc'iala . 



Fcem. — Picea, capite pectoreque cano- tomentosis, proboscide 

 testaceo, antennis nigris, thorace sub-cinereo, abdomine nigro, 

 segmentis testaceo-marginatis, pedibus testaceis, tarsis nigri- 

 cantibus, alis sub-cinereis extus et apud venas obscurioribus, 

 stigmate nigricante, halteribus pallide testaceis apice nigris. 



Female. — Piceous : head and pectus with hoary tomentum ; 

 proboscis testaceous ; antennae black ; thorax with a slight ci- 

 nereous tinge ; abdomen black, with a testaceous band on the 

 hind border of each segment ; legs testaceous ; tarsi blackish ; 



