390 



dant at depths varying from not more than three or four inches below the 

 sod to over a foot below. All were active and most were found in their 

 usnal feeding position. They were for the most part fully grown. Other 

 lots of the grubs were obtained from the same locality in JMarcli and 

 April. Some of those found in March were in frozen soil, but they did 

 not seem affected by it, but were as lively and vigorous as in summer; 

 others were black and dead. Several of those found at this time were 

 infested by from half a dozen to a dozen mites of the genus Tyrogly- 

 phus or Rhizoglyphus, I think. A lot set aside for identification was 

 wnfortuuately lost; hence 1 can not with certainty give even the genus. 

 Although the mites appeared to be parasitic on the larvie, the latter 

 were not apparently injured by them. On larvcB dug early in April 

 Cordyceps ravenelUi Ber. was growing. From each lot of larvte, from 

 twenty-five to fifty were taken and placed in large boxes of soil and 

 supplied with turf. While most of these larvae were of full size, *'. e., 

 from 1.4 inch to 1.6 inch long, two other smaller sizes also occurred, 

 one of them about 1 inch long, and the smallest 0.5 inch to 0.6 inch 

 long. The color is more nearly pure white in the smaller larvae and 

 these are more active than the larger ones. The confined larvae were 

 hatched during the spring and summer, in order that any tendency to 

 puliation might be noted, but most of them were unchanged until Sep- 

 tember, when they pupated, and the last of September and early in 

 October all left the earth as perfect beetles. About 4 per cent of the 

 several hundred kept changed to imagos in early summer. 



Only larvie were found January 28, but at each subsequent digging 

 a few beetles were found with the larvte. They did not voluntarily 

 come from the ground till about the 1st of May, from which time they 

 grew more and more abundant, until early in June, when they began 

 to decrease, and by the last of June all had disappeared. It should be 

 said that the spring was cold and that the beetles were far less numer- 

 ous during the season than usual. Dr. Horn's paper in Trans. Am. Ent. 

 Soc, Vol. XIV, and especially Prof. Smith's article in Proc. Nat. Mus., 

 1888, p. 481, enable students of the genus to identify species in a manner 

 hitherto impossible. Using the above i)apers as guides it was found 

 that all of the beetles appearing at first were L. duhia Smith, and the 

 same is true this present year, for up to this time. May 10, 1 have found 

 only this species. liSbter L.fusca Frohl. appears and soon is as nu- 

 merous as fj. duhia, and throughout the season these two species, found 

 in about equal numbers, are the principal forms, but now and then a 

 stray specimen of several other species occurs. These are L. grandis 

 Smith, L. arcuafa Smith, L. insperata Smith, L. rngosa Mels., but 

 only a few sjiecimens of any of these were taken. 



After the disappearance of the beetles, toward the last of June, 

 none are found until tlie last of September, or early in October, when 

 a few individuals of a new brood come from the ground. So far as 

 observed these are about equally L. duhia and L.fusca. 



