55k 
into effect, the feces of 87 dogs have been exam- 
ined. Of these, 50 dogs, or about 57 per cent., 
were infested with parasitic worms. Of the 50 
dogs thus parasitized, 28 were infested with nema- 
todes only, while 22, or about one fourth of the 
dogs examined, were infested with tapeworms, 
either of one species only, of two or more species, 
or of tapeworms and nematodes. 
Of the 22 dogs infested with tapeworms, there 
were 
7 infestations with Tenia hydatigena, 
8 infestations with Tenia pisiformis, 
4 infestations with Dipylidium caninum, 
2 infestations with Multiceps serialis, 
8 infestations with unidentified Tenia. 
This is a total of 29 infestations with tapeworms, 
representing four recognized species. The number 
of infestations is of course greater than the num- 
ber of dogs infested, since in several cases one 
dog proved to be the host of two or more species. 
The heaviest infestation recorded, from 14 to 
19 specimens of tapeworms, representing three 
species, was as follows: 
Specimens 
LEniamnydatigend reece e 6 
LENA psvfonmis ~-. ese ee a 3 
Dipylidium caninum ............+05- 5-10 
It will be seen from the foregoing that T. hyda- 
tigena is the tapeworm which was most frequently 
found. Out of 37 identified specimens, this spe- 
cies occurred 13 times, 35 per cent. of the speci- 
mens identified being of this species. D. caninum, 
although found in but 4 infestations, comes next 
in number of specimens found, %. e., 12. There 
were 8 infestations with T. ptsiformis, with a total 
of 10 specimens, while only 2 specimens of MU. 
serialis were found and in both cases the identifi- 
cation is uncertain. 
Of the 87 dogs examined, 
9.2% were infested with unidentified tapeworms, 
9.2% were infested with Tenia pisiformis, 
8.1% were infested with Tenia hydatigena, 
4.5% were infested with Dipylidiwm caninum, 
2.3% were infested with Multiceps serialis. 
It is interesting to note what a small per cent. 
were infested with D. caninum, which is usually 
considered the commonest dog tapeworm. In all 
the species considered in this paper, the percentage 
of infestation is far lower than the average given 
in the comparative table of Stiles, 1898 (‘‘ Inspec- 
tion of Meat for Animal Parasites,’’ p. 105). 
The writer is inclined to think that the small per- 
centage shown in the examination of imported dogs 
SCIENCE 
[N.S. Vou. XXXV. No. 901 
is the result of the greater care bestowed on 
valuable animals such as these are. 
Mr. Leonard read a paper entitled ‘‘Some 
Abstracts from Investigations on Parasitic Dis- 
eases Carried on at the Marine Hospital, Wilming- 
ton, N. C.’’ The paper showed the percentage of 
infection of man with various intestinal parasites 
as determined by 688 microscopic examinations. 
Mr. Hall presented the following note: 
Notes on the Parasite Fauna of Colorado. . 
The writer has recently compiled a list of the 
parasites of animals in the state of Colorado, the 
list covering published records, material in the 
collections of the Bureau of Animal Industry, the 
National Museum, the Hygienic Laboratory, the 
Naval Medical School, and some records furnished 
by workers in various colleges. Most of the Bu- 
reau of Animal Industry specimens from Colorado 
were collected by the writer during the past 
summer. 
Using the word identified to indicate at least a 
generic identification, the list includes at present 
a total of 251 identified and 27 unidentified spe- 
cies of protozoan, trematode, cestode, nematode, 
crustacean, mallophagan, hemipterous, dipterous, 
siphonapteran, arachnid and annelid parasites. 
Among the interesting and apparently new spe- 
cies collected by the writer during 1911 may be 
mentioned a Rictularia and a Tenia resembling 
T. pisiformis from Canis nebracensis, and a 
Chabertia from Thomomys fossor. 
One case of hookworm found by Dr. Webb, of 
Colorado Springs, in a patient from the south is 
of interest in that it suggests that with carriers of 
hookworms entering the state, the disease is likely 
to get a foothold, especially in southern Colorado. 
In fact, it is likely that an examination of the 
Mexican miners in southern Colorado, where the 
climate and the mode of life in the Mexican sec- 
tion of some mining towns is favorable to hook- 
worm development, would be repaid by positive 
findings. 
The collection of a species of Anopheles by G. 
P. Weldon in Delta County is of interest, as this 
is the first record of this genus from Colorado, 
according to Professor Gillette, who furnished the 
writer with the record. In his opinion, we have 
here the explanation of an outbreak of malaria on 
the western slope of Colorado. 
The occurrence of what Stiles calls Dermacentor 
andersoni and Banks calls D. venustus has been 
reported from ten counties in Colorado by Hunter 
and Bishopp (1911). It was first reported from 
Colorado by Banks (1895), under the name of 
