392 



-especially those of L. lanceolata. The Carabids, Scarites suhstriatus. 

 Hald., and Pai'macAws sp, {y^o\>q\Aj 'pundulaius, Hald.) were observed 

 to attack the adults. 



Parker (J. R.V The Chinch Bug in Montana. — Jl. Econ. Entom., 

 Concord, N.H., xiii, no. 3, June 1920, pp. 318-322. 



Bliss'us hucojJterus, Say (chinch bug) was first recorded from Montana 

 in 1911, and is of considerable interest on account of its economic 

 importance, and also because its life-history in Montana differs remark- 

 ably from that recorded in other States. Previous records from 

 other States have described hibernation as occurring in the adult stage; 

 and even in the southern States, where there are two generations, the 

 majority of the first generation do not reach maturity until July. 

 In Montana, fourth-instar nymphs were found at their maximum 

 abundance as early as 2ord May, and newly-transformed adults have 

 been found on 12th June. It does not seem possible that the seasonal 

 history of B. leucoptenis could be a month earlier than in Kansas and 

 Missouri, which are 10° further south, and the only reasonable explana- 

 tion is that the insects hibernate in Montana in the fourth nymphal 

 stage. This cannot, however, be definitely determined until the 

 insect has actually been observed in its winter quarters. 



The infestation in Montana was first noticed in May in a field of oats, 

 and in June the bugs were also found on wheat and maize, but 

 apparently no serious damage was done. The bugs evidently occur 

 most abundantly on native grasses. Both long and short-winged 

 forms were present in about equal numbers. It is probable that the 

 infestation has slowly spread up the valley of the Missouri River to 

 Montana. 



In the discussion following this paper, it was mentioned that there 

 is some variation in the hibernation and emergence in Kansas, the 

 bugs sometimes leaving hibernation in March and appearing in early 

 spring, and sometimes hibernating until May, 



Larson (A, 0.). A Predaceous Enemy of Bean Weevils. — Jl. Econ. 

 Entom,., Concord, N.H., xiii, no. 3, June 1920, pp. 322-323. 



Females of Bruchus quadrimaculatus, F. (bean bruchus) that were 

 under observation during oviposition, were observed to be behaving in 

 an abnormal mamier, and this was found to be due to the presence of 

 numerous mites attached to their bodies. Although many eggs were 

 laid in the container, very few Bruchids emerged, and examination 

 showed many dead larvae and pupae in the beans, together with many 

 gravid female mites. Many dead adults were aLso found in the jar 

 mth gravid female mites protruding from under their wings. The 

 mites multiplied rapidly, killing off the whole of the next generation of 

 B. quadrimaculntus. B. ohtectns, Say, when put into the same jar, were, 

 able to rid themselves to some extent of the mites by using their 

 mouth-parts a»s a comb for legs and antennae and then using the latter 

 to brush their bodies, but they eventually succumbed. The mites 

 were probably Pediculoides ventricosus, Newp,, and were found to 

 produce an intensely irrigating rash upon any person handling the 

 infested Bruchids [see also R.A.E., B, vii, 161, etc,]. 



