20 TRANS. S. D. Society NATURAL HISTORY 
132. Lygus pratensis Linn. One form of this species very like 
the typical lineolatus P. B. is found abundantly about culti- 
vated fields, especially alfalfa, throughout the year. 
133. Lygus pratensis var. elisus n. var. 
This is a smaller form often taken in great numbers on Che- 
nopodium. It is pale greenish with the pronotum and scutellum of 
a clearer green; head and anterior margin of the pronotum yel- 
lowish, neck when depressed showing a black line. Pronotum with 
two round black dots placed just behind the callosities and some- 
times a few brown points before them. Scutellum usually showing 
two mediam basal dashes and the extreme lateral angles black. 
Elytra pallid with a dusky cloud on the middle of the clavus and 
a double one on the disk of the corium posteriorly, all of which 
may be reduced or wanting; there is a minute brown point at the 
tip of the clavus and another at the apex of the cuneus. Legs 
paler than in the typical form but with the same pattern of mark- 
ing. Length 5-6 mm. 
Described from numerous specimens taken at Mussey’s Aug- 
ust 6th, 1918, and elsewhere. 
134. Lygus contaminatus Fallen. Not uncommon, May to Octo- 
ber. This is quite distinct from the eastern pabulinus; it 
varies some in the amount of the dark clouding on the 
elytra. 
135. Lygus sallei Stal. Occasional, April to June. The brilliant 
sub-metallic polish of this species with the slender black and 
white lines on the hind margin of the pronotum will dis- 
tinguish it. 
136. Lygus rubicundus Fallen. Two uniformly rufous examples 
were taken at Mussey’s in May, 1914. 
137. Lygus distinguendus Reut. I have a single specimen from 
the Selkirk Mts., B. C., that seems to be variety B of Reu- 
ter (Hemip. Gymn. Eur. V, p. 74, 1896). The variety de- 
scribed below is apparently constant and may prove to be a 
distinct species. 
138. Lygus distinguendus var. nubilus n. var. 
Form of rubicundus Fall.; yellowish-testaceous mottled and 
clouded with fuscous or black. Head with a dot on the cheeks be- 
fore the base of the antenne and unusally about four spots on the 
vertex forming a square. Antenne pale, the third and fourth 
joints and usually the apex of the second infuscated. Pronotum in 
fully colored examples with fuscous markings as follows: a spot 
on the anterior margin behind the eye, another behind each callo- 
sity which may be enlarged and form a cloud on the anterior disk, 
a point near the middle of each lateral margin, and four on the 
hind edge which may unite and form a transverse vitta. In pale 
examples most of these markings are reduced or absent but the 
two spots behind the callosities and those on the humeri persist. 
Scutellum black with the basal angles and median line pale, the 
extreme tip white. Brown markings on the elytra usually forming 
