LIMNOBIA. 91 



largest of them ; there is a pale brownish band across the apical 

 portion of the wing and some clouds along the posterior margin. 



Bab. Trenton Falls, N. Y. ; White Mountains, N. H. ; Maine 

 (Packard) ; northwestern regions of the Hudson's Bay Territory 

 (Kennicott). 



In the five male specimens w^hich I have before me, the auxiliary 

 vein ends in the costa a little beyond the inner end of the stigma, 

 and the cross-vein is somewhat anterior to the tip of this vein. 

 Thus, the fork formed by them has its anterior branch longer 

 than the posterior one (the opposite is the case in most specimens 

 of L. immatura). The two female specimens in my possession do 

 not show these characters ; both branches of the fork, above 

 alluded to, are of the same length, and the anterior one does not 

 reach beyond the inner end of the stigma. 



4. L. hlldsonica 0. S. 9.— Thorax vittis quatuor; halteres ca- 

 pitulo fusco ; alse fusco-maeulatge et nebulosse ; rnaculis obscure fuscis ; in 

 cellula basali prima maculae quatuor maguse, fere sequidistantes ; venula 

 transversa marginalis juxta apicem vense longitudinalis prirnae sita. 



Thorax with four brown stripes ; knob of the halteres brown ; wings with 

 brown spots and clouds ; the spots dark brown ; the first basal cell con- 

 tains four large, nearly equidistant spots ; the marginal cross-vein is at 

 the tip of the first longitudinal vein. Long. corp. 0.5. 



Syn. Limnobia hudsonica 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1861, p. 289. 



Head blackish above, with a cinereous bloom ; vertex with a 

 yellow line in the middle ; rostrum and palpi brown ; antenme 

 brown ; first joint yellowish-ferruginous ; the two following like- 

 wise, but more or less marked with brown. Thorax brownish- 

 yellow, with four brown stripes ; the intermediate ones are sepa- 

 rated by a yellowish line, which is gradually widened anteriorly ; 

 pleurae mixed with yellowish and brown ; halteres with a brown 

 knob. Abdomen reddish-yellow, apparently with brownish bands 

 on the posterior segments. Wings with deep brown spots along 

 the anterior margin ; the first is at the inner end of the two basal 

 cells ; its hindmost tip, which is in the second basal cell, is con- 

 nected with a second spot in the first basal cell ; the third spot, 

 at the origin of the praefurca, is trapezoidal, its oblique sides, 

 being somewhat emarginate ; the fourth forms an oblique band 

 between the inner end of the submarginal cell and the anterior 

 margin ; the fifth and last is at the posterior end of the stigma. 



