RHIPIDIA. 83 



femora pale ; tip of the latter and of the tibia) brown. Abdomen 

 brown. Wings with a grayish tinge, densely covered with pale 

 brown spots and smaller dots ; several larger spots along the 

 anterior margin ; numerous dots in all the cells ; cross-veins 

 clouded. 



Hah. Europe and North America; principally the northern 

 regions of the latter. White Mountains, N. H. ; Trenton Falls, 

 IS". Y. ; Washington, D. C. ; Maine (Packard) ; Hudson's Bay 

 Territory (Kennicott) ; Illinois (id.). This insect occurs twice 

 in the year, in the spring and in autumn ; it is more rare towards 

 the south. 



A female specimen in my possession has the spots along the 

 anterior margin larger and the nebulosities on the cross-veins 

 darker ; the smaller dots in the cells, on the contrary, are not so 

 dense as usual, leaving large hyaline intervals between them. 



2. R. fidelis 0. S. 'J, and J. — Cinereo-fusca, tlioracis vitta brunnea; 

 alis in margine anteriore fusco-nebulosis ; antennae maris unipectinatae. 



Grayish-brown ; thorax with a brown stripe ; wings with brownish clouds 

 along the anterior margin ; antennse of the male unipectinate. Long. 

 Corp. 0.3. 



Syn. Rhipidia fidelis 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 209. 



Rostrum, palpi, and antennae blackish ; the flagellum of the 

 latter (beginning with its second joint) is short unipectinate in 

 the male, and only moniliform in the female ; thorax brownish, 

 pruinose with gray above, a broad brown stripe in the middle ; 

 lateral stripes less distinct. Halteres pale ; feet brownish, femora 

 pale at the basis, darker at tip. Abdomen brown; male genitals 

 paler. Wings with a pale brownish tinge, excepting a large 

 whitish region, embracing the praefurca and the stigma ; in this 

 region, however, the stigma itself, a round spot at the origin of the 

 praefurca, another one at the inner end of the submarginal cell, 

 and a small dot at the tip of the auxiliary vein are brown ; a 

 narrow margin along the apex of the wing is likewise whitish. 



Hah. Sharon Springs, N. Y. ; Illinois. I possess only two 

 specimens. 



The European R. uinseriata Schin. is remarkably like this 

 species, but the apex of the wings^is altogether dark. 



