December, ’23] webb: thurberia pink boll worm 545 
Apanteles 2 n. sp. 32 
Microbracon n. sp. 7 
Perisierola n. sp. 1 
Microhymenopter undet. 1 
Total hymenopt. parasitism. 41 
The above is a parasitism of nearly 29%. 
In addition to this parasitism, which may yet be increased by muscoid parasites 
issuing later from the pupae, from 5% to 10% of the infested bolls containing worms 
are opened by the Southwestern jay, Aphelocoma sp., probably the form known as 
Sieberi arizonae Ridgway. 
Thus some 35% of the worms appear to be destroyed by natural enemies in the 
Sabino Basin region, at the least estimate, or well over one-third. 
The 22 pupae will, I hope, yield the adult this season, so that the species may be 
identified. A single specimen of a moth found in one of the insectaries, which had 
crawled in during the night and may have been attracted by the odor from the 
Thurberia bolls, was determined by Dr. Dyar as Perigea continens Edw. It is a 
noctuid and about the right size for the Thurberia bollworm moth, but may have 
nothing to do with it. 
The worms in the bolls were extensively attacked, both dead and alive, by two 
or more species of Phorids while in the insectaries. These phorids are attracted to 
all fermenting substances, and the frass from many worms assembled in small space 
is probably the cause of their appearance in great numbers in the rearing receptacles. 
They accounted for the large mortality in the worms. If the receptacles were covered 
tightly enough to exclude them, the air was also excluded. As they were not met 
with in the bolls in the open, they are not taken into account as a control factor. 
Other Thurberia Insects 
Anthonomus thurberiae Pierce—Found frequently in all stages. 
Dichomeris deflecta Busck—Many evidences found during August. 
Inglisia malvacearum Ckll.—This scale was found in abundance on two plants 
at 3,550 and 3,800 ft. 
Cecid leaf-gall—Very abundant about the first of September. 
Thyanta perditor Fab.—Adult found sucking green boll at 4,100 ft. 
Spliyrocoris 2 n. spp.—Nymphs found sucking green bolls at 3,800-4000 ft. 
Formica jusca guava Buckley—A perfectly constant attendant on the Thurberia 
plants everywhere. No plants found without them. I did not see the species else¬ 
where. 
Eriophyes sp.—Bad infestation of plants in patches at 3,500-4,000 ft. 
Acridiid sp.—Greenish-yellow nymphs found on Thurberia on half dozen occa¬ 
sions at about 3,500 ft. Not seen elsewhere. 
Many bees and Acmaeodera sp. were collected in the flowers; Cardochilis n. sp., 
Cryptocephalus sp., on the foliage; Gen. Nov. aff. Stenophasmus sp. on an infested 
boll, and Lygaeus belfragei Stal on boll. 
The hymenoptera were det. by Gahan and Rohwer; coccid by Morrison; heter- 
optera by Gibson; ant by Mann. 
C. H. T. Townsend.” 
Upon arrival in Washington the 22 pupae of the bollworm mentioned 
2 This species has been described as Apanteles thurberiae Muesebeck, in Proc. 
U. S. Nat. Mus. Vol. 58, pp. 507-508. 
