THE CANADIAN ENTOMOLOGIST. 87 



the posterior transverse vein is slightly curved and almost perpendicular. 

 Hab. \\'ashington Territory, H. K. Morrison. This species is most 

 nearly related to saratogensis, but differs in the greater size of the second 

 joint of the antennae, and the long hairs or bristles above ; the narrower 

 costal border and sparser reticulation of the wings, and the blackened 

 tips of the tarsi. 



Tet. plebeja Lw. Specimens from Washington Territory agree closely 

 with this common Eastern species. The median abdominal stripe is how- 

 ever more distinct, and there is a feeble indication of a double curvature 

 in the posterior transverse vein. 



Tet. pliwiosa Lw. The most common species of this genus in Con- 

 necticut. This species runs so closely to the preceding that it is some- 

 times extremely difficult to distinguish them. The posterior cross vein 

 shows a considerable variation in its shape, as do the frontal markings. 



Tet. MONTANA sp. nov. %. Third joint of the antennae obtuse, 

 short, not distinctly excised, bristles plumose with black, wings greyish, 

 unicolorous, posterior cross vein feebly bi-arcuated. Long. corp. 8.5 mm. 

 Long. al. 7 mm. 



Acorn colored. Front golden yellow, with a narrow distinct reddish 

 median furrow, the black spot near the orbit wanting, but a reddish spot 

 between the base of the antennae and anterior corner of the orbit. 

 Antennae reddish-yellow, first two joints thickly covered with black hairs, 

 third joint not longer than the second, and not distinctly excised above; 

 bristle of the antennae plumose with black. Face perceptibly lighter than 

 the front, and by refiected light with a golden glisten. Occiput without 

 distinct white spot. Thorax with a very distinct median, longitudinal 

 stripe, bordered with a dusky line ; also two narrow, less distinct, and 

 interrupted stripes on each side ; thorax covered with numerous short 

 black hairs. Pleurae distinct chestnut, and somewhat pollinose with gray. 

 Abdomen unicolorous and thickly covered with black hairs ; a narrow 

 dark median stripe interrupted at the incisures ; sides dusted with grey. 

 Legs luteous ; anterior femora darker than the middle and posterior, hind 

 femora with a single long bristle on the under side in front ; three last 

 joints of anterior, two of middle and posterior tarsi black. Wings broad, 

 not reticulated, of a uniform greyish or blackish tint ; posterior transverse 



