MORSE: ORTHOPTERA OF NEW ENGLAND. 
531 
shoulders. The triangular black marks on the disk above the 
bases of the hind femora, which are nearly equilateral in the 
ornatus and arenosus series are here broader-based, i.e., more 
extended along the humeral carinae. 
Measurements. 
Total Pronotum Hind femora 
Male 9.7-13.5 8.&-11.5 4.6-5.2 
Female 13.5-15.3 12 -13.5 6 -6.5 mm. 
The Angulate Pygmy Locust prefers moist meadow lands on 
sandy ground, soils which are perpetually moist or which do not 
become unduly hard even when temporarily dried out. The 
greatest number of the specimens which I have seen were living 
on the edges of a swamp that had been filled in with sand and 
upon which the water 
frequently stood for 
days at a time. Small 
areas of this character 
may support hun- 
dreds of these grace- 
ful little Locusts, so 
inconspicuous in size, 
color, and flight as to 
attract no notice save 
by accident or pur- 
poseful search, when 
the sunshine glinting 
on their iridescent wings, or the presence in the net of stick-like 
debris apparently endowed with life, leads to their discovery. 
Adults are most numerous in April, May, August, and Septem- 
ber and doubtless hibernate. This species inhabits the whole 
of New England and extends far to the West. 
H 
Fig. 96. — Angulate Pygmy Locust, Acrydium granu- 
laium granulatum — with wings spread, and two color- 
varieties. (After Lugger.) 
Broad-shouldered Angulate Pygmy Locust. 
Acrydium grajiulatxim incurvatum (Hancock). 
Tetlix incurvatus Hancock, Amer. Nat., vol. 29, p. 761 (1895). 
This form, described from the western part of the country, is 
very closely related to A . granulatum granulatum and appears 
to intergrade with it. Typically, it is distinguished by having 
