461 



that over 1,000 individuals examined from one greenhouse proved 

 to be all females, it is probable that the species is parthenogenetic, 

 though this has not been proved. 



A number of poisons were used in various combinations in control 

 experiments, but very few of these were fomid to have any value. 

 Phosphorus paste or borax might hold the insect in check in the case 

 of small infestations. In the present investigations, pure kerosene 

 sprayed along the top and sides of the benches and into holes in the 

 masonry brought out all the insects, which were all killed as they 

 came in contact with the oil. This treatment cleared the house of 

 the insects, but as kerosene scorches foliage, care must be taken not 

 to touch the leaves of the plants with the spray. 



Zappe (M. p.). Eradicating the Little House Ant or Pharaoh's Ant 

 from a Dwelling House. -17th Rept. Connecticut State Entomologist 

 for 1917, Conn. Agria. Expt.Sta., New Haven, Bull. no. 203, 1918, 

 pp. 314-315. 



A case is recorded of a house badly infested with the small house 

 ant [Monomorium pharaonis, L.]. The house was cleared of the insects 

 by means of a poison-bait composed of 1 lb. sugar (or h lb.) dissolved 

 in a quart of water, to which is added 125 grains of sodium arsenate. 

 This is boiled until thoroughly dissolved and a tablespoonful of honey 

 is then added. When cool this mixture was used with pieces of sponge 

 on small, shallow dishes, two or three dishes being placed in each 

 room. The bait was renewed two or three times at a few days' 

 interval and in less than three weeks the ants had all disappeared. 



Gautieb (C). Etudes physiologiques et parasitologiques sur les 

 L6pidopt§res nuisibles. La Ponte des Apanteles, Parasites de 



Pieris brassicae. [Physiological and Parasitological Studies on 

 Injurious Lepidoptera. Oviposition of Apanteles Parasites 

 of Pieris brassicae.] — C. R. Soc. Biol., Paris, Ixxxi, no. 15, 27th 

 July 1918, pp. 801-803. 



In a previous paper the author has touched on the question of 

 the probable stage in the Hfe-history of Pieris brassicae at which 

 infestation by the Braconid parasite, Apanteles glomeratus, occurs [see 

 this Review, Ser. A, vi, p. 190]. In order to establish a point on 

 which opinion in the past has been so widely divided the author 

 experimentally reared larvae from eggs of P. brassicae taken from 

 a plot of land on which the larvae of the same insect from the age of 

 24 hours and upwards were found to be parasitised to a very high 

 degree. It was found that not one of the larvae reared in captivity 

 was parasitised, and that all, with the exception of less than 2| per 

 cent, that died from natural causes, eventually pupated, thus proving 

 conclusively that the parasitisation of P. brassicae does not occur 

 during the egg-stage. 



ArribalzacxA (E. L.). La Langosta voladora de Colombia y Venezuela. 



[The winged Locust of Colombia and Venezuela.] — Plujsis, Buenos 

 Aires, iv. no. 16, 15th May 1918, pp. 49-79, 7 figs. [Received 

 loth August 1918.] 



Being of opinion that the determination of the winged locust of 

 Costa Rrica and Venezuela as Schistocerca paranensis [see this Review, 



