218 



Felt (E. P.). Mycodiplosis moznettei, n. sp. — Florida Enf., Gainesville, 

 V, no. 3, January 1922, p. 46. 



The midge, Mycodiplosis moznettei, sp. n., is described from Florida, 

 ^\here numbers were reared from the scale, Pidvinaria pyriforniis, 

 Ckll. The larvae devour the eggs of the female Coccid, and, when 

 full-grown, construct small cocoons under the scale of the host. 



Weigel (C. i\.). A Serious Menace to Greenhouse Roses. — Amer. 

 Rose Ann., 1920, pp. 66-69, 2 figs. (Abstract in Expt. Sta. 

 Record, Washington, D.C., xlv, no. 9, 8th February 1922, p. 859.) 



The strawberry root worm or leaf beetle, Typophorus (Paria) 

 canellus, F., a native beetle long recognised as a seriou^ pest of straw- 

 berries and raspberries and occasionally of the apple, crab apple, 

 juniper and several other plants, has been found to be of prime import- 

 ance to many of the commercial rose growers of the United States. 

 While one or two florists report that they have had experience with 

 this pest for several years, the authentic records indicate that it has 

 been exceptionally injurious during the last two seasons only. 



The damage to rose foliage is caused mainly by the adult, and does 

 not differ materially from the injury done to the strawberry. The 

 entire foliage is badly perforated and ragged, presenting a shot-hole 

 appearance as a result of voracious feeding. The beetles show a 

 marked preference for the new and young shoots, their attack giving 

 the rose a very unsightly appearance. Ultimately, the entire growth 

 is badly stunted from the gradual killing of the affected parts, thereby 

 reducing the commercial value of the plants. 



Preliminary control measures have shown arsenicals to be quite 

 ineffective, the best results having been obtained by the use of hydro- 

 cyanic acid gas against the adults. The author recommends fumi- 

 gation, at night only, at the rate of 2 oz. sodium cyanide for every 

 1,000 cu. ft. of space, with an exposure of two hours. Growers are 

 advised not to bring into their houses turf or soil in which straw- 

 berries or raspberries, either wild or cultivated, have been growing. 



Theobald (F. V.). A New Aphid Genus and Species found in England. 



— Bidl. Ent. Res., London, xii, pt. 4, February 1922, pp. 429-430, 

 1 fig. 

 The Aphid, Laingia psammae, gen. et sp. n., is described. This 

 new genus is intermediate between Atheroides and Sipha, the features 

 differentiating it from these genera being given. The species was 

 taken at Littlestone, Kent, on marram grass {Psamnia arenaria) and 

 meadow foxtail grass {Alopecurus pratensis). It is preyed upon by 

 many species of Coccinellids, of which the chief is Adalia bipunctata, 

 and by many Syrphid larvae. The grass seed was apparently quite 

 ruined by the numbers of Aphids present. 



SuBRAMANL^M (T. V.). Some Natural Enemies of Mango Leaf-hoppers 



{Idiocerus spp.) in India. — Bull. Ent. Res., London, xii, pt. 4, 

 February 1922, pp. 465-467, 2 plates. 



" The mango crop in India is attacked by the three Jassids, Idiocerus 

 niveosparsus , L atkinsoni and /. clypealis. Within the past three 

 years, three natural enemies of the adult hoppers and one of the 

 nymphs have been discovered, on which notes are recorded from 

 observations made in the mango gardens of Bangalore. 



