1917] ECONOMIC ZOOLOGY — ENTOMOLOGY. 259 



fly, from one to ten, with an average of seven, individuals having been reared 

 from each puparium. Its complete development from oviposition to emergence 

 was found to require from 18 to 20 days during July and August, and there 

 appear to be three or four generations a year. 



A few observations on the apple maggot parasite, Biosteres rhagoletis, 

 C. A. Good {Canad. Ent., 48 (1916), No. 5, p. 168). — Tn these notes, supplement- 

 ing data by Woods (E. S. R., 34, p. 456), the author records the occurrence of 

 B. rhagoletis near Digby, Nova Scotia, where it was observed to parasitize the 

 larvffi. 



One new genus and five new species of ichneumon flies, H, L. Viereck 

 (Proc. Biol. Soc. Wash., 29 (1916), pp. 165-111). 



New miscellaneous chalcidoid Hymenoptera with notes on described 

 species, A. A. Gibaxilt (Ann. Ent. Soc. Amer., 9 (1916), No. 3, pp. 291-308). — 

 Among the species of economic importance are Ablerus perspcciosus n. sp., 

 reared from the West Indian peach scale in Japan ; Hahrocytus obscuripes, 

 reared in connection with the strawberry weevil at St. Paul, Minn.; Uscanopsis 

 carlylei n. g. and n. sp., reared from an Qgg mass of Mcmbracis tectigera, Port 

 of Spain, British West Indies; Oligosita oophagus n. sp., reared from an egg 

 mass of a leafhopper embedded in a leaf of sugar cane, Diego Martin, British 

 West Indies ; Oonatocerus triguttatus n. sp., reared from an egg mass of a 

 leafhopper on orange, Caroni, British West Indies; Aprostocetus tvhitmani 

 n. sp., reared from the eggs of Physonota unipunctata at St. Paul, Minn. ; 

 Cheiloneurus albicornis, reared from Pulvinaria spp. on poison ivy and from 

 Physokermes picew at Madison, Wis. ; Ooctonus quadricarinatus n. sp., reared 

 in connection with bark beetles from limbs of pine infested with Pityogenes 

 hopkinsi, at Syracuse, N. Y. ; Sympiesomorphelleus bicoloriceps n. sp., reared 

 from Tinea on Solanum ; Eupelminus coleopterophagus n. sp., reared in con- 

 nection with the strawberry weevil at St. Paul, Minn. ; Eemwnasoidea oculata 

 n. g. and n. sp., reared from Pscudococcus citri on bamboo at Manila, 

 P. I. ; etc. 



Life history of Habrocytus medicaginis, a recently described parasite of 

 the chalcis fly in alfalfa seed, T. D. Urbahns (U. S. Dept. Agr., Jour. Agr. 

 Research, 7 (1916), No. 4, pp. 147-154, pi. 1, fig. i).— This is a report of obser- 

 vations of H. medicaginis, a parasite of Bruchophagus funebris, commenced in 

 the fall of 1912 and continued into 191.5. Laboratory studies were conducted at 

 Glendale and Pasadena, Cal., while field observations and collections extended 

 over several States west of the Rocky Mountains. The parasite was first reared 

 by the author from alfalfa seed collected at Yuma, Ariz., in August, 1912, and 

 subsequently from collections of alfalfa seed made at points in the different 

 alfalfa seed-growing districts between the Rocky Mountains and the Pacific 

 coast, including California, Idaho, Utah, and Oregon. Specimens from New 

 Mexico, Kansas, and South Dakota have also been examined. 



The author's observations show that a larva of this species may completely 

 destroy its host and become fully developed within a minimum period of five 

 or six days after taking its first food. Under a condition of dryness, such as 

 is brought about by hot desert winds, a resting period varying from a week to 

 a year may follow. Development continues upon the return of warm moist 

 conditions. 



The minimum length of the larval stage as observed by the author was nor- 

 mally about 12 days, the maximum a year or more. The prepupal form re- 

 quires two or three days, and the pupal stage varies from 10 days under favor- 

 able field conditions in midsummer to 52 days in March and April. Observa- 

 tions show that a period of from about 30 days to one year, and almost two 

 years in exceptional cases, may be required for the completion of a single 



