February 1S93.] 



PSYCHE. 



391 



area enclosed between the transverse line and 

 the radial raj is dark reddish-brown. In ad- 

 dition to the two rays of the upper surface, 

 there is a dark ray upon the lower side upon 

 the second median. Expanse $ 55 mm. 



Explanation of Plate 9. 



Fig. 1. Cocoon-bag of Oecura Goodii, 

 Holl. The dotted line indicates a portion 

 removed for purposes of dissection. 



Fig. 2. Cocoon-bag of Anafhe Moloney? 

 Druce. 



Fig. 3. Oecura Goodii, $ . sp. n. 

 Fig. 4. Oecura Goodii, $ , sp. n. 

 Fig. 5. Anafhe clara, $ , sp. n. 

 Fig. 6. Anafhe subsordida. $. sp. n. 

 Fig. 7. Anafhe moloneyi, $, Druce. 

 Fig. 8. Anafhe infracta, $ , Wis. 



ON THE ATTRACTION OF LIGHT FOR THE TWO SEXES OF 



COLEOPTERA. 



BY HENRY FREDERICK WICKHAM, IOWA CITY, IOWA. 



Referring to the capture of moths, 

 Dr. A. S. Packard writes, in a foot-note 

 on page 246 of his "Entomology for 

 Beginners," "It is a curious fact that in 

 general the males alone are attracted to 

 light ; the same is probably true of 

 beetles, especially the June beetle." 

 As this statement does not agree very 

 well with my own experience in col- 

 lecting Coleoptera I have been led to 

 go over a portion of my material and 

 embody the results in the following 

 table. With the exception of the speci- 

 mens from Tucson, which were taken 

 at street gas-lamps, all were captured at 

 electric light. 



Fifteen sets of insects have been 

 examined. These are numbered in the 

 table and I have subjoined the locality 

 in which each was taken as I find that 

 a set from one locality will give a dif- 

 ferent proportion of a certain sex than 

 that from another. With the imper- 

 fect data at hand it is impossible for me 



to determine what relation the date of 

 capture may have to the proportion of 

 either sex (since it sometimes happens 

 that one sex appears somewhat earlier 

 than the other) and I leave this for 

 future studies. As a rule onlv a few 

 days were spent at any one collecting 

 point and the set of each species repre- 

 sents the work of two or three consecu- 

 tive evenings, never of more than a 

 week. 



The insects have been taken at ran- 

 dom from several different families, 

 chiefly using genera, however, in which 

 the male secondary sexual characters 

 are sufficiently well developed t-> enable 

 the sexes to be separated without too 

 much trouble or chance of error. 



Of these sets, those marked 1. 3, 9, 

 12 are from Tucson, Arizona; 2, 4, 5, 

 10, 15, from Albuquerque, New Mex- 

 ico ; 13, 14, from Spokane Falls, Wash- 

 ington, all collected by myself. The 

 remainder are from Lincoln, Nebraska 



