432 DESCKIPTION OF TWO NEW 



the same time bestowing on the species the name of 

 the discoverer, who worthily pm^sues entomological re- 

 searches, spite of many pressing public engagements. 



The subjoined descriptions embrace the diagnostic 

 peculiarities of the insects in qtlfestion. 



Phora fobmicarum, n. sp. — Nigro-cinerea, fronte 

 setosa, caniculata ; an tennis mediocribus, cinereis; palpis 

 magnis, flavis ; halteribus flavidis ; pedibus totis pallide 

 flavis, inermibus, tibiis intermediis unicalcaratis, posticis 

 modice dilatatis ; alis subhyalinis, nervo secundo sim- 

 plici, nervulis vix undulatis. Long, vix ^ lin. 



Frons broad, grey, bristly, two large bristles being 

 close to the eye-margin ; down the centre is a deep 

 impressed channel, which at its lower end joins a 

 channel above the antennae, and at its upper end a 

 channel round the raised vertical triangle ; the space 

 between these two latter channels (comprising the true 

 frons) is about once and a half broader than deep ; 

 on the vertical triangle are two bristles ; the third 

 joint of the antennae is moderately large, ovate, grey ; 

 the arista short, somewhat yellowish, almost naked ; 

 the palpi conspicuous, all pale yellow, with a few short 

 black bristles at the tip; on the cheeks are some short 

 black bristles. 



The thorax is grey or brownish grey, broad, not much 

 arched, the disk being nearly flat, and on the hinder 

 part absolutely concave ; on the disk there are no long 

 bristles, but a dense clothing of rather short black 

 bristles ; along the side of the thorax between the 

 humeri, the base of the wing, and the scutellum are 

 some long black bristles, and two on the thorax just 

 before the scutellum; on each side of the scutellum 

 are two long bristles ; halteres dirty pale yellow ; 

 abdomen bare, dull black, with slightly yellowish 

 incisures ; ovipositor polished black, long, slightly 

 incurved and grooved. 



