THIRTIETH REPORT OF THE STATE ENTOMOLOGIST 23 



neither place have the infestations reached any great proportion 

 as yet. 



spruce tussock moth (Olene near plagiata Wlk.).— Since 

 1939 there have been reports of larvae of a large tussock moth 

 partially defoliating spruce trees in the city of Billings. Investiga- 

 tions of the infestations, rearings, and determinations by Heinrich 

 have established the identity of the species causing the damage. 

 Defoliation has not been excessive in the trees examined, and at 

 least one of the premises infested in 1943 was apparently free of 

 the pest in 1944. Lead arsenate sprays have been recommended 

 and have given control. 



white grub parasite (Xylaria sp.). 

 . The grubs of the June beetle Phyllophaga 

 anxia Lee. were received from County 

 Agent Stanley Halvorson in Hamilton, on 

 April 24, 1944. They were attacked by a 

 fungus, the fruiting bodies of which were 

 emerging from the region of the head. 

 These were identified by Dean F. B. Cot- 

 ner as belonging to the genus Xylaria. 

 Later specimens attacked by the same 

 organism were received from others in 

 Hamilton. Apparently the disease was 

 common on white grubs in that locality, 

 and is recorded because of the unusual- 

 ness of such records in the State. 



maggots attacking a human (Wo hJ- 

 Figure 6. Diseased white fahrtia meigeni Schin.).— In the Twenty- 

 grub. Tusk-like growths ninth Report of the State Entomologist 7 is 

 are fungus which killed recorded the attacks of maggots on young 

 grub. (Somewhat enlarg- mink. The larvae were reared and proved 

 ed) to be those of a large fly, Wohlfahrtia 



meigeni Schin. On July 12, 1943, specimens 

 of maggots were received from Dr. E. M. Joneschild of the Live- 

 stock Sanitary Board in Helena. Concerning these maggots Dr. 

 Joneschild stated that they had been removed from a baby in 

 Great Falls. A fly had been seen in the baby buggy under the 

 mosquito netting and had apparently attacked the child as it 

 cried out. Not long afterward eight or nine red spots appeared 

 on the child which at first were considered to be mosquito bites. 

 However, these areas enlarged, and about three days afterward 

 a portion of the maggots were seen protruding from the openings, 

 and a doctor was consulted who extracted them. But one live 

 specimen reached this office on the 12th and it was immediately 

 placed in a pupating jar, in which it emerged as an adult male 

 fly of the above-named species on the 27th. The specimen was 



•^lont Agr. Exp. Sta. Bull. 408, p. 25. 1942. 



