381 



can be easily skimmed off. The galls after rinsing and plunging into 

 hot water may be given to poultry, and even if thrown away must 

 be treated with hot water to ensure the death of the Nematodes. 

 The sound grain should be well rinsed immediately to prevent injury 

 to germination, and then spread on canvas to dry. Care must be 

 taken to prevent freezing of the wet grain. The salt solution may 

 be used again, but should be kept well away from stock and poultry. 



The "17-Year Locust" in 1919.— -U.S. Dept. Agric, Washington, 

 D.C., Giro. 127, 5th April 1919, 11 pp. [Received 8th July 1919.] 



It is believed that the swarm of the 17-year locusts [Tibicen septem- 

 decim] predicted to appear from the last week in May to the first week 

 in June of 1919 will be unusually large, its range including the whole 

 or portions of 20 States. Brood 18 of the race with a 13-year cycle 

 is expected to be smaller, only 5 States being affected. The damage 

 caused by this cicada is comparatively small, as it eats very little, 

 its principal food consisting of small quantities of plant juices. The 

 chief damage is done by the sUts made by the female in the tender 

 branches of trees for oviposition. Of forest trees, oak and hickory 

 seem to be preferred for this purpose ; pines, cedars and other species 

 that exude gummy substances are avoided. In orchards, apples, 

 peaches and pears are preferred, but all other trees may be attacked. 

 The injury is only serious where young trees are concerned, for which 

 preventive measures are suggested [see this Revieiv, Ser. A, v, p. 369]. 



Burke (H. E.). Notes on a Cocoon-making Colydiid (Coleopt.). — Proc. 

 Entom. Soc. Washington, B.C., xxi, no. 6, June 1919, pp. 123-124. 



Deretaphrus oregonensis, Horn, which is parasitic on a number of 

 wood-boring beetles, probably has a life-cycle of two or more years 

 and hibernates in the adult form in a cocoon. It has been recorded 

 from various districts in California parasitising TrachyJcele opulenfa, 

 Fall, in living incense cedar [Libocedrus decurrens) and T. nimbosa in 

 red fir [Abies magnifica), Dendroctonus jejfreyi, Hopk., in dead Jeffrey 

 pine (Pinus Jeffrey i), D. moyiticolae, Hopk., Buprestis laeviventris, Lee, 

 and B. aurulenta, L., on dead sugar pine (P. lambertiana), and in the 

 pupal cell of a Cerambycid in lodge-pole pine (P. murrayana). 



Burke (H. E.). Notes on the California Oak Worm, Phryganidia 

 calif ornica (Lepid.). — Proc. Entom. Soc. Washington, B.C., xxi, 

 no. 6, June 1919, pp. 124-125. 



Phryganidia californica lays its eggs partly on deciduous oak 

 (Quercus lobata) and partly on the live oak (Quercns agrifolia). Those 

 laid on the former rarely reach maturity owing to the leaves falUng 

 and becoming unfit for food unless the winter is very mild. 



The principal natural enemies of this moth are a wilt disease ; 

 Podisus maculiventris, Say (spined soldier bug), which sucks the eggs 

 as well as both the larval and pupal stages ; a small fly, Thryptocera 

 jlavipes, Coq., which attacks the large larvae ; and the Hymenopterous 

 parasites, Chalets abiesiae, Gir., and Itoplectis behrensi. Cress., which 

 infest the pupae. 



