PACKARD. ] PHYLLOPODS OF NORTH AMERICA. 343 
the posterior half of the abdomen. The tips of the 5th endites are edged 
with reddish. Observed in very large specimens, from Dorchester, 
Mass. Jan. 4 to 9, 1882.* 
BRANCHIPUS SERRATUS (Forbes). 
Eubranchipus serratus Forbes, Bull. Illinois Mus. Nat. Hist. I. 13, Dee. 1876. 
This interesting species is of the size and general appearance of B. 
vernalis, but the frontal appendages are twice as large and long, reach- 
ing to the end of the first joint of the male claspers. They are broad 
and flat; on the middle of the inner and outer edge is an expansion 
from which arise six digitiform processes, those on the inner edge being 
shorter and smaller; the appendages each end in a rolled-up sleuder 
tip. Male claspers with the Ist joint short and thick; the 2d 
joint much shorter and thicker than in B. vernalis, being one-half as 
long, thicker in proportion, with the end squarely cut off, and triquetal 
seen from the end. At the base of the joint is a broad-based stout spur 
which points inwards. The caudal appendages are a little shorter and 
less coarsely setose along the edge than in B. vernalis. The genitals 
are aS in B. vernalis; the ovisac of the female is similar, the opening 
being the same, while the eggs are of the same size as in that species. 
Total length of male, 15-20"; length of claspers, 4""; length of 2 
joint, 2"™; of caudal appendages in both sexes, 2.5-3™; total length 
of female, 20™°. 
‘“Collected in temporary pools of water at Normal, Iinois, in April, 
1876; about a fortnight afterwards it entirely disappeared.” “Another 
species [specimen] has been sent me by Professor Bundy, by whom it was 
taken in Wisconsin.” I am indebted to Prof. S. A. Forbes for a pair of 
type specimens of this interesting species, which bears a close resem- 
blance to, and thus represents in the United States, Branchipus grubet 
of Europe; it differs, however, from that species in the rather smaller 
frontal appendages, which are not so continuously and deeply fringed 
*The following observations by Dr. Gissler, made on the appearance of Branchipus 
vernalis and Chirocephalus holmani may prove of interest: 
BROOKLYN, November 14, 1881. 
I recorded the following in my memorandum last year: Ponds near Maspeth dried 
up in October, 1880, until October 30, filled up; heavy rain again November 5; heavy 
rain again and 68°F. on November 11; November 18, a thin coat of ice formed in the 
evening; November 19, little rain in afternoon, again cold in evening; November 20, 
cold; November 21, freezing; ditto November 22, 23, and 24, a little snow at 9 p. m.; 
25th, snow, cold; 26th, very cold, and 27th and 28th, thawing after 10 a. m.; same day 
rain from 10 a. m. till 11 p. m.; 29th, clear and mild; 30th, frozen; December 1, rain; 
2d, mild and clear; 3d, cool and clear; 4th, mild; 5th and 6th, warm; 7th, cold; 8th, 
9th, 10th, and 11th, very cold; 12th, mild; 13th warmer, and 14th, ditto with rain; De- 
cember 15, 16, and 17, all ponds solidly frozen; 18th, thawed; 19th, frozen; ditto 20 
and 21, with snow; frozen, 22, 23, and 24; thawing on 2oth; frozen, 26, 27, 28, and 
29; December 30, 5° below zero; 31st, cold, frozen; ditto January 1, 2, 3, 4, and 5, 
1831; milder and muddy on 6th, 7th, and 8th; colder on 9th, rain in the evening; 
ditto all day on 10th; 11th, went to Maspeth, ice 1 inch thick on isolated pond, water 
running into it from neighboring elevated fields, nothing found; 12th and i3th cold; 
warm rain in A. M. of 14th, cold after 3 p. m., went to Maspeth and obtained one 
larva, the smallest I ever saw, from pale race; 15th, 17°F. at 9 a. m.; cold 16th, ob- 
tained 3 red Lubranchipus larvee a few days old; 16th, cold; 17th mild; ditto 18, 19, 
and 20, eight inches ice at Maspeth; 21st, warm rain; 22d, snowed over night, cold; 
23d, cool; 24th, 25th, and 26th, cold; 27th, 28th, 29th, 30th, and 3lst, very cold; a 
larger larva was found February 10, age about 5 days; heavy rains February 18 and 
19; March 3, obtained from Maspeth 4 larve 51™™ long, red Hubranchipus, ice 3 inches; 
March 6, obtained 17 larve of the red Lubranchipus between 3-5™™ long, no pale ones 
seen; March 11, obtained 40 or 42 half-grown red Hubranchipus; March 23, a great 
number of adult Chirocephalus found near Glendale. 
C. F. GISSLER. 
