31 
Locusts. In 1877 it became abundant in a restricted locality near 
Socorra, Few Mexico, and in 1885 this species was noticed rather 
abundantly in company with the Devastating Locust in the San Joaquin 
Valley in California, occuring in about the proportion of one Differ- 
ential Locust to twenty-five Devastating Locusts. 
Life-history and Habits. — In the vicinity of St. Louis, Missouri, 
the first specimens of this locust were observed to become winged July 
19. Eggs were laid September 9. As a deviation from the usual egg- 
laying habits of the genus, it is an interesting fact that the eggs are 
sometimes very numerously placed under bark of logs that have been 
felled on low land. The eggs of this species, unlike those of spretus, 
atlanis, and femur-rubrum, are not quadrilinearly but irregularly ar- 
ranged. This irregular arrangement also occurs in the egg-masses of 
Schistocera amerieana and Oedipoda phancecoptera. The head ends of 
the eggs in the pods point mostly outward. One hundred and seventy- 
one eggs have been counted in a single mass. 
Mr. Coquillett has made some interesting observations on the life 
history and habits of this species, which will be found in the 1885 
report. They acquired wings from the last week in June to the last 
week in July, and began laying eggs July 23. A single female occupied 
75 minutes in depositing an egg mass. The situation chosen for egg- 
laying was invariably the edge of one of the basin-like hollows at the 
foot of a tree. This locust is not easily startled, and its ordinary flight 
is rather heavy, and sustained only for a distance of 12 to 20 feet. Mr. 
Coquillett found it principally in trees, and it seemed to be particularly 
fond of the leaves of the poplar. He did not find it in grain fields, but 
it was numerous in fields of alfalfa. Mr. Webster has noticed this in- 
sect gnawing the limb of an apple tree at Princeton, Ind. 
THE TWO-STRIPED LOCUST. 
(Caloptenus bivittatus Scudd.) 
Range of Species. — This species has a very extended range, being 
fouud from Maine to Utah and California and extending as far South 
as Carolina, Mississippi, and Texas. 
Mv- 
Fig. 9.— Caloptenus bivittatus, natural size (after Iiiley.) 
Destructive Appearances. — This locust is distinguished from the 
last-named species in having two lateral yellowish stripes from the head 
