300 Mr. F. Walker's Characters of undescrihed Dlptera 



neath ; frontalia deep black, widening much in front ; facialia 

 without bristles; epistoma hardly prominent ; palpi tawny; an- 

 tennae not reaching the epistoma ; second joint reddish ; third 

 linear, rounded at the tip, full four times the length of tlie 

 second ; arista stout for a\)out one-third of its length, rather 

 longer than the tliird joint ; tliorax slightly gilded, brighter along 

 each side, with five black stripes ; pectus cinereous ; abdomen 

 very slightly gilded, black at the base and heneath and along the 

 hind borders of the segments ; wings grey, darker along the costa 

 for two-thirds of the length, and with some dark streaks along the 

 black veins ; prsebrachial vein forming an obtuse angle at its 

 flexure, very slightly curved inward from thence to its tip, which 

 is at a little in front of the tip of the wing ; discal transverse vein 

 forming an obtuse angle at one-third of its length, parted by more 

 than half its length from the border and from the flexure of the 

 praebrachial ; alulae dark cinereous. 



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



Mexico. 



Eur'igasler fertorla. 



Fcem. — Nigra, valida, capite aurato, frontalibus atris, antenna- 

 rum articulo 3° longo, aristae triente basali robusto, thorace 

 subaurato, vittis quatuor nigris, pectore cinereo, abdomine 

 ovato, segmeutis cinereo-fasciatis, alis sub-cinereis basi ob- 

 scurioribus, vena, prsebrachiali angulum perobtusum subro- 

 tundatum fingente, vena discali transversa intus subarcuata : 

 alulis sordide albidis. 

 Female — Black, stout : head gilded ; frontalia deep black, 

 widening in front ; facialia without bristles except towards the 

 frontalia ; epistoma not prominent ; antennae nearly reaching the 

 epistoma; third joint linear, slender, about four times the length 

 of the second ; arista very much longer than the third joint, stout 

 for about one-third of its length ;, thorax slightly gilded, with 

 four black stripes ; pectus cinereous ; abdomen oval, with a broad 

 cinereous band on the fore border of each segment; legs with 

 rather small bristles ; wings slightly greyish, darker at the base; 

 veins black; praebrachial vein forming a very obtuse and some- 

 what rounded angle at its flexure, very slightly curved inward 

 from thence to its tip, which is at a little in front of the tip of the 

 wing ; discal transverse vein straight, excepting an inward curve 

 near its hind end, parted by a little less than its length from the 

 border and from the flexure of the praebrachial ; alulae dingy 

 whitish. 



Length of the body 4 lines ; of the wings 7^ lines. 

 Mexico. 



