856 EXPERIMENT STATION RECORD. [Vol. 87 



ing leaf-hopper eggs, but not proved to be parasitic on them ; Paranagrus optahi- 

 lis n. g. and n. sp., reared from eggs of VerkinsieUa saccharicida ; P. perforator 

 n. sp., reared from the eggs of delphacld leaf-hoppers; Polynema rcduinoH 

 n. sp., parasitic in eggs of Reduviolus blackburni in the Hawaiian Islands; 

 Anagrus frequens n. sp., reared from eggs of delphacids ; and Paruriella viridis 

 n. sp., reared from the seeds of grass {Panicum sp.). 



Parasitism of the larvae of the Mediterranean fruit fly in Hawaii during 

 1916, C. E. Pembebton and H. F. Willabd i[Bien.'\ Rpt. Bd. Comrs. Agr. and 

 Forestry Hatcaii, 1915-16. pp. 111-118). — This is a general summary of the 

 fruit-fly parasite situation in 1916. 



The four parasites Optus humilis, Diarhasma tryoni, D. fuilawayi, and Tetra- 

 slichus giffardianus, are said to have become e.'Jtablished in many localities in 

 the Territory. Summaries are given of the percentage of parasitism of fruit 

 flies infesting various crops, etc., in different localities. The average parasitism 

 as taken from over 26,000 larvae secured from the kamani nut {Terminalia 

 catappa) was about 41 per cent. It is much higher daring some weeks and at 

 other times much lower. The average parasitism in larva secured from most 

 other fruits throughout the ripening season was somewhat le.'JS than 40 per 

 cent, although coffee was an exception, as the larvjp therefrom were found to 

 be as a rule highly parasitized. There seems to have been very considerable 

 fluctuation in relative abuiHlauce of at least three of the establishetl species of 

 fruit fly parasites. Whereas O. humilis .spread rapidly in a few months after 

 liberation, it took D. tryoni two years to gain a foothold, but within the four 

 months prior to the preparation of this paper It had almost entirely supplanted 

 O. humilis, particularly in Kona and about Honolulu. 



Notes on the construction of the cocoon of Praon, C. N. Ainslte (Ent. 

 Ncics, 28 {1917), Xo. 8. pp. .%4-^67). 



An egg parasite of the sumac flea-beetle, C. R. Crosby and M. D. Leonard 

 {Ent. Xrin,<i, 28 {IDH), A'o. S, p. S68. fig. 1). — A cbalcidid parasite reared from 

 the eggs of the sumac flea-beetle {Blrpharida rhoi.<<) at Norfolk, Va., by L. B. 

 Smith, is described as new under the name Tctrastichus oripraiwius. 



An aphis parasite feeding at puncture holes made by the ovipositor, L. P. 

 RocKwooD {Jour. Eton. Ent.. 10 {1911), Xo. 4, p. 415). — Observations of the 

 feeding of Aphflinus lapisligni n. sp., on the juices of its host {Aphis bakeri) 

 are recorded. 



Megastigmus aculeatus introduced into New Jersey from Japan, H. B. 

 Weiss {Jour. Econ. Ent., 10 {1917). Xo. -}, p. U8).—M. arulcatus. a hymen- 

 opteran which destroys the entire Interior of seed of Rosa miilliflora. appears 

 to have become established in New Jersey and has al.so been reported as oc- 

 curring at Ithaca, N. T. 



The embryonic development of Trichogramma evanescens. monembryonic 

 egg parasite of Donacia simplex. J. B. Gatenby {Quart. Jour. Micros. Sci. 

 [London], n. ser., 62 {1917), Xo. 246. pp. 149-181, pis. J).— This chalcidid ovi- 

 posits on the egg mass of a beetle (D. simplex), a single parasite emerging 

 from a host egg. and is also known to parasitize eggs of dragon flies. 



Contribution to the life history and habits of the spinose ear tick. Omith- 

 odoros megnini, W. B. Herms {Jour. Econ. Ent., 10 {1917), Xo. 4- PP- 407- 

 411). — A report of observations of the biology of 0. megnini in California, data 

 relating to which species have been previously noted (E. S. R.. 27, p. 8G5). 



Tarsonemus pallidus, a pest of geraniums, P. Garman {Maryland Sta. Bui. 

 208 {1917), pp. S27-S42, figs. i5).— This is a report of studies of the biology of 

 T. pallidus { = T. approximatus), made during the course of an investigation of 

 the cause and method of transmission of the geranium leaf spot, and to which 

 the author gives the name " pallid mite." 



