ill the Colltctioa of W. IV. Saunders, Esq. 301 



Eurigaster postica. 

 Foem. — Nigra, lata, capite albido, fiontalibus atris, antennarum 

 articulo 3° longo, aristae dimidio basali valido, thorace 

 cinereo vittis quatuor nigris, scutello postico rufescente, 

 abdomine ovato, lateribus rufescentibus, segmentis cinereo- 

 fasciatis, alis sub-cinereis, basi obscurioribus, vena praebra- 

 chiali angiistum sub-obtiisuin fingente, vena discali transversa 

 intus vix arcuata, alulis albis. 

 Female. — Black, broad : head whitish ; frontalia deep black, 

 slightly widening in front, beset with bristles which extend along 

 one-third of the facialia ; epistoma not prominent ; antennae 

 almost reaching the epistoma; third joint linear, about four times 

 the length of the second ; arista stout for half the length, very 

 much longer than the third joint; thorax with cinereous tomentum, 

 and with four slight black stripes ; scutellum reddish hindward ; 

 abdomen oval, reddish on each side, with a broad irregular cine- 

 reous band on the fore border of each segment ; wings greyish, 

 darker at the base ; veins black ; prsebrachial vein forming a very 

 slightly obtuse angle at its flexure, near which it is very slightly 

 curved inward, and is thence straight to its tip, which is rather far 

 in front of the tip of the wing ; discal transverse vein hardly 

 curved inward near its hind end, parted by hardly more than half 

 its length from the border, and by somewhat less than its length 

 from the flexure of the prsebrachial ; alulae white. 

 Length of the body 3\ lines ; of the wings 7 lines. 

 Mexico. 



Eurigaster hahilis, 



Foem. — Nigra, robusta, cinereo- tomentosa, capite albido, fronta- 



libus atris antice latescentibus, palpis fulvis, antennis epistoma 



attingentibus, thorace viitis quatuor indistinctis nigris, scutello 



et abdominis lateribus ferrugineis, pedibus validis, alis cinereis, 



vena praebrachiali angulum sub-obtusum sub-rotundatum 



fingente intus apicem versus vald^ arcuata, vena transversa 



discali recta, alulis sordide albidis. 



Female. — Black, stout, with cinereous tomentum : head whitish ; 



frontalia deep black, widening in front ; facialia with a few bristles 



towards the frontalia ; epistoma not prominent ; palpi tawny ; 



antennae reaching the epistoma ; 3rd joint about four times the 



length of the 2nd ; arista slender, more stout towards the base, 



very much longer than the 3rd joint; thorax with four indistinct 



black stripes ; scutellum and sides of the abdomen ferruginous ; 



legs stout ; wings grey ; veins black ; praebrachial vein forming a 



