TBO experiment station EECORD; 



this " destructive green pea-louse "' of America under tlie name of M. destructor. 

 tVhetlier M. reticulata of Sanderson may prove to be M. solanifoUi or not, the 

 author has at present no biological evidence to indicate, but the structural char- 

 acter of the auteunse and cornicles separate M. rctkmlata from M. destructor and 

 show that it is at least closely allied to M. solanifoliil Technical descriptions of 

 the winged viviparous, apterous viviparous, and apterous oviparous females and 

 winged male of M. solanifolii are followed by detailed descriptions of insectary 

 host plant tests for both. 



A bibliography is appended. 



The rufous scale at Key West, Tlorida, A. W. Moeeill (Jour. Econ. Ent., If 

 (1911), No. 2, p. 211). — The author records the occurrence of fielenaspidus 

 orticulatus in the United States. 



Spraying for the euonymus scale, Z. P. Metcalf (Jour. Econ. Ent., If (1911), 

 No. 2, pp. 259-261). — The author's experiments lead him to conclude that early 

 March, early June, and early August are desirable times to spray for this pest 

 in North Carolina. The spraying experiments lead to the conclusion that " of 

 the 3 materials tried, scalecide, 1 : lO in winter and 1 : 25 in summer, would 

 rank the highest. Next to this we would place kerosene emulsion, 60 per cent 

 in winter and 30 per cent in summer. Either one of these materials seems 

 to be an effective remedy for the euonymus scale. Our experience goes to 

 3how that these strengths may be used without any danger of injuring the 

 plant. Commercial lime-sulphur did not prove to be an effective remedy in any 

 of the strengths used, although the hedge sprayed with commercial lime-sulphur 

 showed decided improvement over no spraying at all." 



The San Jose scale and how to control it, P. Hayhuest (Arkansas Sta. Bui. 

 107, pp. 369-393) .—This general account of the San Jose scale, which is in- 

 creasing in importance in Arkansas, replaces Bulletin 102, previously noted 

 (E. S. R., 20, p. 655). Aphelinus fuscipennis, A. mytilaspidis, Ahlerus clisio- 

 campw, and Aspidiotiphagus citrinus have been found by the author to occur 

 in Arkansas as parasites of the San Jose scale. 



Two important cantaloup pests, R. I. Smith (North Carolina 8ta. Bui. 21 Jj, 

 pp. 101-lJf6, figs. 17). — This general account includes a report of life history 

 studies of the pickle worm (Diaphania nitidalis) and the melon worm (D. 

 hyalinata) . 2 of the worst pests of cucurbitaceous crops, especially of cantaloup, 

 squash, and cucumbers. In Georgia and Florida these 2 species are often of 

 about equal importance, but in the vicinity of Raleigh where the author's investi- 

 gations have been conducted for the past 2 seasons, and over the greater por- 

 tion of North Carolina, the pickle woi'm is more injurious than the melon worm. 



The eggs of the pickle worm hatch in from 3i to 4 days. During normal July 

 and August weather the larvae require from 12 to 16 days for development. The 

 rate of development for the 5 instars is 2* days for the first, 2 days for the 

 second, 2 days for the third, 2* days for the fourth, and 5 days for the fifth, an 

 average from hatching to pupation of about 14 days. The average life cycle was 

 found to be 27 days. 



"A full fourth generation occurs in North Carolina, but after the first one the 

 generations are hopelessly mixed and overlapping. With sufficient food supply 

 and warm October weather a fifth generation very probably occurs. Around 

 Raleigh pickle worm moths continue to emerge until the latter part of October, 

 but seldom later. 



" The pickle worm does not have any important parasitic enemies in North 

 Carolina, judging by the last 2 seasons' work by the writer. Out of the hun- 

 dreds of worms collected from the field and bred to maturity no true parasites 

 have been reared with the exception of Chalcis ovata, and only one of these has 

 been secured. . . . Predaceous insects kill a small percentage of pickle worms. 



