Experiment Station Record, Volume 92, January-June, 1945 Page: 85
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1945] ECONOMIC ZOOLOGY-ENTOMOLOGY 85
sizes of over 2,000 larvae of all stages of the southern armyworm were made
and found to vary between 0.24 and 2.99 'mm. The detailed data were statistically
examined, and it is concluded that growth ratios tend to fall in geometric progression,
and that with this species there are only six instars. A sharp break
in the plot of the mean head-capsule widths occurred at the third instar, the points
apparently following regular progressions above and .below this break. The break
may correspond to a definite change in the physiological state of the insect.
The imported long-horned weevil Calomycterus setarius Roelofs, J. P.
JOHNSON (Connecticut [New Haven] Sta. Bul. 479 (1944), pp. 119-142, ills. 16).C.
setarius, the imported long-horned weevil, which is a native of Japan, has
become established in Connecticut, Illinois, Iowa, Maryland, Massachusetts, New
York, Pennsylvania, and Rhode Island. The adults, which are wingless and
parthenogenetic, emerge from the soil about June 25 and become most abundant
during July and early August. Eggs are deposited in soil or debris. Larvae are
present in the soil from July until the following June. Pupation takes place in
June or early July. Adults feed on leaves and blooms of numerous plants, while
the larvae apparently eat small roots and organic matter. A dust containing 25
percent cryolite with pyrophyllite gave good control.
The black flea beetles of the genus Epitrix commonly identified as cucumeris
(Harris) (Coleoptera: Chrysomelidae), L. G. GENTNER. (Oreg. Expt. Sta.).
(Ent. Soc. Wash. Proc., 46 (1944), No. 6, pp. 137-149).-Examination of large
series of specimens and study of the published literature (91 references) led to
the conclusion that there are at least three distinct species involved-E. cucumeris
and two others here described as new.
Notes on the habits and life-history of the leaf-eating brown weevil Phyllobius
pyri L. (Col.: Curculionidae), F. H. JAcoB (Ent. Mo. Mag., 4. ser., 5 (1944), No.
52, pp. 78-79).
A key to the genus Acanthognathus Mayr, with the description of a new
species (Hymenoptera: Formicidae), M. R. SMITH. (U. S. D. A.). (Ent. Soc.
Wash. Proc., 46 (1944), No. 6, pp. 150-152).
The North American species of Ancistrocerus, proper (Hymenoptera: Vespidae),
J. BEQUAERT (Ent. Amer., 23 (1943), No. 4, pp. 225-286, illus. 4).-A
taxonomic monograph, including new nomenclature and identification keys.
A new species of Bracon (Hymenoptera: Braconidae) from Kansas, R. D.
SHENEFELT. (Wash. State Col.). (Jour. Kans. Ent. Soc., 17 (1944), No. 2, pp.
74-76).-B. pascuensis n. sp. is described.
The genus Cressochilus Banks (Hymenoptera: Pompilidae), J. C. BRADLEY.
(Cornell Univ.). (Canad. Ent., 76 (1944), No. 7, pp. 150-152).-Four species
(two new combinations) and a key are included.
The relationship of Dasymutilla permista Mickel to Dasymutilla quadriguttata
(Say) and behavior notes on the species, C. L. REMINGTON (Ann. Ent. Soc.
Amer., 37 (1944), No. 2, pp. 198-200).-The great dissimilarity of the sexes in
members of the Mutillidae (the velvet ants) makes it frequently impossible to
connect e $ and 9 9 by study of preserved specimens. A $ of D. permista
was seen to mate with a 9 D. quadriguttata; these therefore appear to be one
species and the first, being the older name, must stand. The habits are briefly
described. The great abundance of Myzine quinquecincta (F.) on the lawn with
the mutillids, coupled with the reported rearing of D. quadriguttata from M.
quinquecincta cocoons, leads the author to believe that the tiphiid is the host of
the mutillid under the conditions where this study was made.
The genus Dinocnemis Banks (Hymenoptera: Pompilidae), J. C. BRADLEY.
(Cornell Univ.). (Canad. Ent., 76 (1944), No. 6, pp. 131-132).-Three specieswith
keys and including two new combinations-are considered.
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U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 92, January-June, 1945, book, 1947; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5064/m1/98/: accessed March 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.