463 



badly damaged by caterpillars, many of which must have been brought 

 in from the fields^ Tobacco plants in the sheds may become breeding- 

 places for the tobacco aphis [Myzm persicae] and Phthorimaea heliopa. 

 Baled leaf suffered little from Lasiodenna [serricorne]. 



Mason (A. C). U.S. Bur. Ent. Cryptothrips laureli, a New Tlirips 

 from Florida (Thysanop.). — Ent. Neia-'s, PJiiladelpIiia, Pa., 

 xxxiii, no. 7, July 1922, pp. 193-199, 1 plate. 



The thrips living on all species of native bay trees [Tamala), and pre- 

 viously thought to be identical with Cryptothrips floridensis [R.A.E., 

 A, viii", 134], has now proved to be a distinct species, C. laureli, sp. n. 

 Although it is only known to occur in Florida, it probably extends 

 over the entire range of its food-plant. It will also feed on camphor 

 (CampJiora camphora), but it is doubtful whether it would become 

 permanently established on it. The average life-cycle from egg to 

 adult for 50 individuals occupied 28-3 days, the incubation period 

 being 6-5 days and the average time for larval and pupal stages 

 together 21 -8 days. In confinement the hfe of the adult often lasted 

 about 60 days. All stages are found around the terminal buds of the 

 bay, the larvae feed on the newly unfolding leaves ; the adults also 

 attack the new growth. As a rule, no damage is done, but in a heavy 

 infestation the buds may be killed. The leaves generally outgrow 

 the injury. This thrips is also able to puncture the human skin. 



An undescribed species of Tetrastichus lays its eggs in the body of the 

 larva of C. laureli and causes its death. An Anthocorid bug, Anthocoris 

 sp., is predacious on the larvae. 



Spessivtseff (P.). Zur Lebensweise des Chaetoptelius vestitus, Rey. 

 [A Contribution to the Knowledge of the Habits of C. vestitus.] — 

 Entom. Blatter, Berlin, xviii, no. 2, 30th June 1922, pp. 75-77. 



Chaetoptelius vestitus, Rey, is very common on the southern bank of 

 the Crimean Peninsula, where it breeds m the mastic tree, Pistacea 

 mutica. This bark-beetle and a small species, Estonoborus perrisi, 

 Chap., which nearly always occurs with it on mastic, both occasionally 

 attack pines. 



GouiN (R.). Les Vers a Soie et les Hannetons comme Aliment du 

 B6tail.— La Vie Agric. et Rur., Paris, xxi, no. 27, 8th July 1922, 

 pp. 27-28. 



Professor Pirocchi, of Milan, has found that suitably treated cocoon 

 waste from silk spinning mills can be substituted for linseed cake 

 for milch cows, two parts of it replacing three of linseed cake. 



As cockchafers [Melolontha] are expected to be extraordinarily 

 abundant in France in 1922, attention is drawn to their richness in 

 nitrogen and to the possibility of extracting oil from them. The 

 larvae are eaten by poultry and pigs. 



Grai^i (E.) & RosTRUP (S.). Oversigt over Sygdomme hos Landbrugets 

 og Havebrugets Kulturplanter i 1921. [Plant Diseases and Pests 

 in Denmark in 1921.]— Tidsskri ft f. Planteavl., Copenhagen, 

 xxviii, 1922, pp. 185-246. [With a Summary in English.] 



During the year under review the yield from beet seed fields was 

 greatly decreased by the black aphis. Aphis rumicis {papavens). 

 The leaves, particularly in early-sown fields, were wilted by the beet 



