1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 4! 1 7 



15. L. dispar Burm. 



Three $ specimens, all from Florida, (coll. 0. V. It.). Mr. Sohwarz 

 has it from Enterprise, Fla., May 7-20, June 9; Lake Harney, Fla., 

 May 4. 



In genital structure this species most remarkably resembles the pre- 

 ceding in general type, differing only somewhat in details. The spe- 

 cies seems not at all common. 



16. L. gracilis Burm. 



Many specimens, $ and 9 . New York (coll. C. V. R. and J. B. S.), 



4 $ , 1 9 ; New Jersey (coll. C. V. R.), 1 $ ; Pennsylvania (coll. J. 15. 

 S.), 1 9 ; North Carolina (coll. C. V. R.), 1 9 ; Louisiana (coll. C. V. R.), 

 1 S (the North Carolina and Louisiana specimens collected by Morri- 

 son). District of Columbia, many specimens, collected for the Museum ; 

 for dates, etc., see introductory remarks. 



Mr. Schwarz collected it also at Detroit, Mich. This species becomes 

 common rather late in the season and is easily recognized, offering lit- 

 tle or no variation except in size. 



The genital structure in both sexes is distinctive. The claspers of 

 the S are symmetrical, free anteriorly, with an unusually long curved 

 process. In the 9 , the true pubic process becomes well marked for 

 the first time, the superior plates united, forming the base upon which 

 it rests. 



17. L. gibbosa Barm. 



Numerous specimens of both sexes. New York (coll. J. B. S.),5 5,89; 

 Pennsylvania (coll. J. B. S.), 3 $ ; northern Illinois (coll. C. V. R.), 4 



5 ; Detroit, Mich. (coll. C. V. R.), 1 $ ; Minnesota (coll. J. B. S.), 1 $ , 

 3 9 ; Nebraska (coll. J. B. S.), 4 $ ; Douglass County, Kaus., 9,000 feet 

 (coll. O.'V. R.), 1 $ ; Texas (coll. C. V. R.), 1 5,19; Virginia, June 

 12 (coll. C. V. R.), 1 9 ; District of Columbia, many specimens, collected 

 for the Museum. 



Only the slight color variations indicated by Dr. Horn appear in this 

 series, and there seems to be no racial or geographical modification 

 whatever. 



The genitalia of the $ approach the type of glaberrima and prununcu- 

 Una, by the vertical direction of the claspers. In the 9 the superior 

 plates are more normal, and are divided, still however serving as 

 pubic process. The ventral characters of the $ are also figured, a 

 well-marked specimen having been chosen. 



18. L. hirtiventris Horn. 



A single S specimen from Dallas, Tex. (coll. J. B. S.). This seems 

 rather a rare species in collections. The genitalia of the 6 are dis- 

 tinctive, symmetrical, free anteriorly, and better described by the figure, 

 than is possible by words. ^ . , 3 .^q 



Proc. N. m! 88 32 



