te 
i Not a louse could be found, new mohair was in excellent condition, but the 
eta mohair retained a rather bad yellow stain. This substance is very toxic 
to insect life even at a strength of 0.5 per cent and needs further study." 
D. C. Parman, Uvalde, Tex., reports as follows regarding his inves- 
tigations of blowfly parasites and predators: "The emergence from the sta- 
tus jars made in western Texas July 14 to 29 has practically been completed. 
In this area 252 jars were exposed, one was broken, 251 were returned; 
OY, 920 flies emerged from 227 jars; 220 predacious beetles were recorded 
from 59 jars (32 sylphids from 9 jars, 158 Histeridae from 29 jars, and 30 
Staphylinidae from 11 jars). The predators were quite well distributed over 
the area but were most numerous on the escarpments; no new species were 
found so far as has been determined. Only two species of parasites were 
bred from the jars; 158 Brachymeria fonscolombei Duf. emerged from 17 jars; 
these were from the area Leaky to Ozona, and one jar at Comstock; 3,675 
Mormoniella vitripennis Walker were bred from 78 jars; these were mostly from 
the area Leaky to Sonora, but this parasite was indicated to be generally 
distributed." 
"Emergence from the jars exposed in Texas, New Mexico, and Arizona 
from August 19 to September 5 has not been completed. A large larval para- 
site, Alysia ridibunda Say, has been bred from this series in quite good 
numbers from Arizona and New Mexico, over 200 from one jar, and it has prom— 
ise of being a valuable parasite. Xyalosema is beginning to emerge from 
several jars. B. fonscolombei has emerged (506) from 18 of these jars and a 
new record of distribution has been obtained, as it has been found west of 
the continental divide at Safford, Ariz. Only a few jars have yielded M. 
vitripennis; this may be accounted for by the short exposure period of eight 
days. In this series 43 jars were exposed and 377 were recovered; large 
numbers of flies have emerged from the jars in the eastern part of the area, 
but the emergence has been rather light in the western part of the area 
covered. Predators were recorded from most of the jars in the west section, 
and 6,189 histerids and sylphids were recorded from 225 jars; one new and 
apparently valuable sylphid was recorded from Arizona. 
"Considerable breeding work has been done at Uvalde with Alysia ridi- 
bunda from Arizona. Sixteen host tests have been made on the larvae of 
the following flies: Cochliomyia macellaria Fab., Lucilia (two species), 
Sarcophaga plinthopyga Wied., Ophyra leucostoma Wied., and Synthesiomyia 
nudiseta V. d. Wulp. The parasites were very ready to attack the larvae of 
any of the above species, seeming to work readily with either small or mature 
larvae. * * * The developmental period of Xyalosema is indicated to be 
about 31 days, by tests to date." 
Reporting on abundance and longevity of the mosquito at the Portland, 
Oreg., laboratory, H. H. Stage says: "The last larvae of Aedes vexans 
Meig. emerged from breeding jars on June 22, at Wahkeena Falls. Since that 
time, at regular intervals, ten-minute collections have been made for the 
purpose of getting information on longevity and biting habits. Late in 
June, when they were recently emerged from the pupal stage, from 25 to 40 
adults could be collected on one's person in a ten-minute collection. On 
the 17th of September 22 adults were taken, and on September 30, after a 
_ few days of lower temperatures, only 4 were taken in such a collection. These 

