l^l^J ECONOMIC ZOOLOGY — ENTOMOLOGV. 857 



Thersilochus conotracheli, a parasite of the plum curculio, H. A. Gush man 



{V. S. Dept. Ayr., Jour. Agr. licscarch, 6 (I'JJG). \o. 22, pp. HI,1-H',6, pi. I, flgs. 

 9).— Observations made at North Mast. Pa., of the blohw of this Ichn.-umonld 

 parasite are reported, together witli descriptions of Its ln)inature stages. The 

 species was first described in 1871 from New Jersey and Is known to occur also 

 in Connecticut, New York, Pennsylvania. Illinois, Missouri, Kansas, and Ml<-hi- 

 gan. During the seasons of 1914 and 191.-5 it was by far the most abuii.lniit and 

 effective parasite of the plum curculio at North East. 



It is only know to attack this one host and is single-hnxMlod. The adult remlu-s 

 maturity as early as August 24 in New York State, but <loes m.t leave the (•oc(M)n 

 until the following spring, from late May to the middle of .Tune. The female 

 parasite deposits a single egg within the young curculio through tlie curculio 

 oviposition scar. The maximum period of incubation is thought to be six days. 

 The larva passes most of its life as an internal feetler, but when nearly full- 

 grown leaves the host and becomes temporarily an external feeder. In this stage 

 it passes four molts, the first taking place, as a rule, after the host has con- 

 structed its pupal cell, and the other three follow within a period of ten days. 

 Pupation occurs in about four or five days after the construction of the cocoon. 



The parasite apparently does not commence to oviposit until .some time after the 

 curculio has begun its attack on the fruit, tlius does not control the early cur- 

 culio larvip. In 1915 its emergence at North East was retarded by the cold, wet 

 season, so that only the latest of the larvje were attacked, practically all of 

 which were parasitized. 



A new genus of Elophidae from the United States, A. A. Girault (Ent. 

 Xen-s, 27 (1916), No. -}, pp. 152-15J,). 



A new genus of pteromalid chalcidoid Hymenoptera from North America, 

 .\. A. GiKAULT (Canad. Ent., ^8 (1916). No. 7, pp. 2J,&-2JtS). 



Revision of the parasitic hymenopterus insects of the genus Aphycus, with 

 notice of some related genera, P. H. Timherlake (Proc. U. S. Nat. Mus., 50 

 (1916), pp. 561-6//0, pis. 6). — Forty-three species of Aphycus are recognized, 

 of which 14 are described as new, namely, Aphycus mncvlipcnnin reared from 

 Lecanium corylifex at Lawrence, Ma.ss. ; A. albiconiis reared from Pulvinaria 

 sp., at Ikeda, near Kobi, Japan ; A. schwarzi collected in the Santa Rita 

 Mountains, Arizona ; A. rilcyi reared from Lecanium sp. on Japanese persim- 

 mon at Millheim, Tex., from an unknown host on sumach at St. Louis, Mo., 

 from L. corni at Ithaca, N. Y., and at Guclph, Ontario, and also collected at 

 Lansing, Mich., and South Kirtland, Ohio; .4. subfasciatus reared from L. ccra- 

 sifex on elm at Columbus, Kan.s. ; A. similis reared from a lecanium on Jap- 

 anese persimmon at Millheim, Tex.; A. physokermis reared from Pltysokcrnus 

 iiisignicola at Santa Maria, Cal. ; A. meianostomatus reared from a lecanium on 

 linden and oak in Denmark and from L. fuscum in England ; A. kingi reareil 

 from Pulvinaria sp., Lawrence, Mass. ; A. mayri reared from L. coryli in Den- 

 mark; A. rusti reared from Pulvinaria sp., on sweet potato at Sullana, Piura. 

 Peru ; A. claviger collected at Auckland, New Zealand ; A. eriococci reared from 

 Eriococcus hoicardi on Quercus utahensis, Salt Lake City ; and A. lutcolus 

 reared from Coccus hesperidum, Saissetia olece, and C. citricola at various 

 localities in California. 



The genus Pseudococcobius is erected, and three species Pseudococcobius 

 ehrhorni reared from Pseudococcus ryani at San Francisco, Cal.. P. terryi 

 reared from Pseudococcus saccharifolii in Hawaii, and P. bifasciatus reared 

 from Phenacoccus sp., on an apple tree at Lancaster, N. H., are also described 

 as new. 



The genus Botliriocrjera is also erected and the type species B. flaripes reared 

 from a dactylopiine coccid on Elymus at Kimballs, Utah, described as new. 



