508 NOTES ON EACHNOSTERNA. 



iar in the genus. Not only are they strongly asymmetrical, but the 

 peculiar forms of the claspers are entirely indescribable. The female 

 is also very distinctive, and reference is made to the figures for details 

 of the structures'. 



41. L. marginalis Lee. 



One male and two females in the collection. The male we owe to Mr. 

 Sch war/., the females are from North Carolina (J. B. S.), and Missouri 

 (?). (coll. 0. V. R.) 



This seems uot a common species, and is not easily recoguized, though 

 very distinct in genital structure. The claspers in the male are strongly 

 asymmetrical and somewhat peculiar. Iu the female the structure was 

 somewhat distorted and 1 figured the parts just as they appear iu the 

 specimen. Mr. Ulke has the species from District of Columbia, Georgia, 

 Maryland, New York, Illinois. 



42. L. spreta Horn. 



Not in our collection. Dr. Horn had but two specimens, both males, 

 and from one of these the drawings are made. The claspers are very 

 decidedly dissimilar, and distinctly peculiar in form. They have also, 

 rather aberrantly, the inner side of tip hairy. 



43. L. fraterna Hair. 



Of the typical form we have 4 £ , 4 9 from New York, New Jersey, 

 southern Illinois (all from coll. J. B. S.). 



Of the variety cognata we have 5 3, 10 9 ; New York, New Jersey, 

 North Carolina, Louisiana, Nebraska (all from coll. J. B. S.). 



Of the variety forsteri we have 1 £ , 3 9 , from New York and New 

 Jersey (coll. J.B. S.). 



The variety semi-cribrata is not represented. Dr. Horu had 2 males, 

 "possibly Georgia." 



Our specimens indicate a considerably wider range than that given 

 by Dr. Horn, both to the South and to the West. 



Iu looking over the series in the collection, and in addition the dupli- 

 cate material, a very strong variability is noted. The size, form, and 

 sculpture differ remarkably, and the polish of the surface is also very 

 inconstant. The male characters also show a decided variation. Iu 

 some forms Dr. Horn's description applies perfectly, in others there is 

 no distinct elevation, while in the other extreme you inay have a per- 

 fect arch, always feebly marked at the middle, however. The forms 

 found at Washington differed so strongly that I studied the genitalia of 

 the series carefully with the result that I developed out of specimens 

 referred to the form forsteri, a very distinct species. 



The genitalia of the male are unusually well developed. The claspers 

 are disproportionately large and very distinctly asymmetrical The 

 figures show two views, the one with the claspers normally open, the 

 other with the claspers closed so far as possible, the specimen having 

 been taken in coitu. The female shows the disappearance of the superior 



