THE MONTHLY BULLETIN. 



778 



The California Tussock Moth. 



The California tussock moth {Hemerocampa vetusta Boisd.), is 

 distributed throughout the central portion of this State, being espe- 

 cially abundant along the coast. It feeds on the foliage and young 

 fruit of the apple, as well as upon live oak, lupin, cherry and walnut, 

 although the first is the favorite. If this pest, whose larva is a grey 

 caterpillar with numerous colored spots and four prominent white 

 tufts on the upper side, besides two black tufts on the head and one 

 near the posterior end, has been abundant during the past season, it 

 may be advantageous during the winter months to hand-pick the egg 

 masses which are deposited on the limbs and trunks of the trees in the 

 fall. They may be destroyed by burning or immersing in oil. 



Fig. 405. — Larvae of the forest tent caterpillar (Malacosoma disstria Hubn.), on 



apple tree. (Cal. Hort. Com.) 



STORED PRODUCTS AND TRUCK CROP INSECTS. 



Insects Injurious to Stored Products. 



In a previous issue of the Monthly Bulletin attention was called to 

 the work of insects in stored products. The grain weevils, bean and 

 pea weevils, and the well known flour moths cause annually an immense 

 amount of damage. If the holders of infested products will take such 

 time and money as is necessary to destroy these pests they will not be 

 the losers. Carbon bisulphide, using five pounds to the thousand 

 cubic feet of space, seems to be the best fumigant. A tight room is 

 necessary and care must be taken that the liquid shall be kept away 

 from any flame as it is highly explosive. The liquid is poured into 

 shallow dishes and soon evaporates into a heavy gas. The best results 

 are obtained when the temperature is above 70 degrees Fahr. 



