SCUTELLEROIDEA—DOUGLAS LAKE REGION 55 
in the higher and more open ground than the following species, 
E. tristigmus. In the few cultivated districts about the lake 
this also proved to be the most abundant species of pentatomid. 
The grassy fields north of Ingleside and about Riggsville afford 
excellent habitats. 
On numerous oceasions during both seasons E. euschistoides 
was observed on the panicles of the sumach (Rhus glabra), 
particularly toward the middle of August. Many individuals, 
both nymphs and adults, were also observed with the beak in- 
serted in the fruit of this plant, from which its owner was 
sucking the juice. 
On occasions after high winds from off the lake numbers of 
these bugs could be secured in the beach drift near the Biolo- 
gical Station. No doubt the insects in attempting to rise in 
flight were caught by the breeze and carried out over the lake 
into which they fell, to be washed ashore later by the waves. 
This pentatomid may be easily recognized from any other in 
the Douglas Lake fauna by its grayish color, small black spot 
at the lateral angles of the ventral abdominal segments and the 
deeply incised apex of the head. 
Euschistus tristigmus (Say) 
In low wooded places, or along the edges of such situations 
which have grown up in raspberry and blackberry bushes ex- 
amples of this species are likely to be found in considerable 
numbers. 
This also seems to be one of the species in which the in- 
dividuals arrive at maturity comparatively late in the season. 
Nymphs are abundant and considerably exceed adults in num- 
ber up to about June 20, after which time the latter are always 
common in proper habitats. Our earliest record for an adult 
is June 30, 1920, when one specimen was found in beach drift. 
A few other specimens have been taken in beach drift in July. 
Nymphs in second, third and fourth stages are usually plentiful 
on wild raspberry (Rubus idaeus var. aculeatissimus) at Grape- 
vine Point during the entire summer. Other suitable habitats 
are the berry patches west of Bryant’s Hotel and north of 
North Fishtail Bay, where the bugs are common until about 
