1833.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 491 



of the fauna remains the same; there is no addition or subtraction of 

 species. 



May 26. — At Lauier Heights took about 39 specimens of arcuata, and 

 nearly all females. Previous evenings had not been favorable for col- 

 lecting, and only a few specimens flew to light, and were not noted. 



May 27. — At Lanier Heights. Collection was from pear, and quite 

 a number on the succulent weeds of my lower terrace, which I had al- 

 lowed to run wild. L. arcuata, 17 3 ; 51 9 ; L. inversa, IS ,19; L. Mr- 

 ticula, IS ,4 9 ; L. tristis, 1 9 . 



The preponderance of the females at this time is worthy of note. On 

 this date Mr. Ulke found crenulata for the first time at the electric lights. 



May 28. — At Lanier Heights. Night hot and close, Photinus pyralis 

 appearing in numbers. L. micans, 1 9 ; L. affinis, 1 S , 1 9 ; L. Mrticula, 

 19; L. arcuata, 25 S , 50 9 . 



This same evening Messrs. Schwarz and Pergande collected in the 

 Department grounds, keeping the result of beatings on oak and 

 hickory separate. On oak, L. Mrticula, 4 3,39; L. arcuata, 27 S , 46 9 ; 

 L. inversa, 16 S , 24 9 . On hickory, L. liornii, 2 S , 2 9 ; L. gibbosa, 1 9 ; 

 L. inversa, 72 S , 93 9 ; L. arcuata, 74 S , 138 9 ; in all, 513 specimens. 

 L. gibbosa is for the first time added to the list of species. 



May 29. — In order to test whether the same species would be found 

 under different circumstances, we decided upon a trip to the Virginia 

 shore of the Potomac just above Washington, collecting along the crest 

 of the hills there. The result was quite gratifying, showing that a 

 variety of food plants is apparently necessary for a variety of species, 

 and that perhaps the larvae are not indiscriminate feeders. Messrs. 

 Schwarz, Pergande, Alwood, Heideman, and myself constituted the 

 party. Every tree and shrub was beaten, though we found oak, hick- 

 ory ./and persimmon as most fruitful. The captures were: L. Mrticula, 

 21 '$ , 34 9 ; L. micans, 1 S , 5 9 ; L. inversa, 1 S , 3 9 ; L. ilicis, 2 S ; 

 L.crenulata,6 3,5 9; L.fraterna,3 9; L. gibbosa, 1 3,19; L. tristis, 

 9 S ,11 9 ; L. arcuata, 5 S , 6 9 ; L. dubia, 1 S . This is the greatest 

 number of species taken on any one night. In addition there were a 

 number of Serica (2 species), Chalepus, Ligyrus, and Macrodactylus. 



Sumach, which on Long Island I had found excellent for Serica, 

 yielded nothing. Blackberry blossoms, on which I had taken crenulata 

 by the hundreds on Long Island, also proved unattractive here, while 

 persimmon proved quite unexpectedly fruitful of specimens. 



June 3.— Kock Creek Valley. Mr. Schwarz and myself. Cool and 

 damp, little insect life stirring. L. affinis, IS ,1 9; L.fratcma, 1 S ; 

 L. inversa, 3 9 ; L. arcuata, 5 S , 4 9 ; L. Mrticula, 1 3,1 9 . 



Of the affinis the S was taken on persimmon aud the 2 9 on the old 

 oak upon which most of the other specimens were found. 



June 4.— Virginia. Mr. Schwarz, Mr. Alwood, aud myself. L. in 

 versa, 1 9 ; L. arcuata, 1 3,1 9 ; L. crenulata, 2 9 ; L.fraterna, 1 3 , 

 6 9 ; I, micans, IS, 7 9 ; L. Mrticula, 17 3 , 24 9 . Many of these 



