1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 517 



Illinois, Missouri, Nebraska, Minnesota. Bates on the specimens range 

 from April 10 (probably under stones) until the middle of July. The 

 introduction will give tbe dates of the species at Washington. 



This insect, wherever it occurs, is almost or quite as abundant as 

 fusca or its local representative. The species is remarkably constant 

 in the character of the elytral vestiture, but remarkably variable in 

 other respects. A series obtained from Illinois were so much larger 

 and so much more coarsely sculptured, that I at once suspected a new 

 form allied to rugosa; so stroug is this impression at first sight that a 

 rubbed specimen would be unhesitatingly placed with rugosa. The 

 ventral characters are, as usual, variable in the distinctness of the de- 

 pression and ridge of the male. The majority agree well with Dr. Horn's 

 general expression, but quite a fair proportion have the transverse 

 ridge strongly marked. In the female the feature pointed out in several 

 other species exists, viz, a vague transverse line on the penultimate 

 segment, gradually developing until there is a distinct ridge; always a 

 short one, however. 



In the genital structure the relationship to the rugosa group is em- 

 phasized in both sexes, though perhaps not more so than to ilicis. It 

 would almost seem as if groups x and xi should exchange places. 



64. L. delata Horn. 



Not in the Museum collection. But two males, from east Kentucky, 

 were known to Br. Horn, and of these he allowed me to study one. 

 On a considerably reduced scale the claspers of the male resemble those 

 of ilicis. 



65. L. ilicis Enoch. 



Numerous specimens of both sexes. New York, New Jersey (coll. J. 

 B. S.); Pennsylvania, Nortb Carolina (coll. Morrison) ; Georgia (coll. J. 



B. S); northern Illinois, central Missouri (coll. C. V. B.); Kansas (coll. 



C. V. B., J. B. S.); Iowa (coll. J. B. S.). 



Included in the above are the localities for ciliata Lee, which I can 

 not believe distinct from ilicis. This species ranges to Kansas — much 

 farther west than given by Dr. Horn, and one of these specimens 

 puzzled me not a little before I would say it were either ilicis or ciliata. 

 From Pennsylvania we have 3 $ and 1 9 , apparently collected at the 

 same time. Of these, 2 $ are good ilicis, while 1 8 audi 9 are perfect cili- 

 ata. Of the specimens collected by myself in New York, all were takeu 

 near the entrance of Prospect Park, Brooklyn. Of these, some are de- 

 cidedly pruiuose, and with scarcely perceptible pubescence, while oth- 

 ers are decidedly pubescent, with more or less upright hair intermixed, 

 in some specimens forming the lines along the elytral costre, typical of 

 ciliata. The characters of color and punctuation are all evanescent, 

 and I can not find any evident difference in the crenation of the tho- 

 racic margin. In the ventral cbaracters of the male the differences are 

 of extent rather than character, and not constant. The female ilicis 



