375 



ered that tliev wove in the act of inatinii-: tho the male at 

 tii'st stood oil tlio hack of the female in the normal position, 

 thev remained tlnis for onlv a hrief moment, when liy their 

 rapid movements the male was dislodg'ed, and tho still in 

 cojmla. end to end, they were ahle to make ra])id ])rogTess 

 aloiiii" the wall, the female preceding and the male nuining 

 backward. After aliont ;; minnte I succeeded in getting them 

 into a cyanide botth', hnt they broke apart before dying. 



Again in ]\rarch, IDl."*, at the same place I made similar 

 observations nixni <inr dther common species [Peri pi an da aus- 

 tralaslae). 



The roaches have a favorite retreat in a crevice under the 

 edge of the roof. When I turned on the light I saw several of 

 them running along the board, at the edge of this crack, and I 

 recognized that they were in the activity of mating. The 

 female ran from ]ilace to place, very rapidly, and now and 

 then a male dashed ont of the crevice after her, — if not pur- 

 sued far the female soon i-eturned, apparently in an eifort to 

 entice other males. After a rapid scamper a male succedcMl in 

 landing upon her back and mating took place, tho they re- 

 mained in this ])osition for only a few seconds, before the 

 female ran oft' with the nude still attached and running back- 

 wards. Apparently this is the nornuil method of mating with 

 roaches, at least if disturl)ed while this act is taking place, for 

 I nuide similar observations last year as noted above on P. 

 a))iericaiia. I succeeded in securing the pair in the cyanide 

 bottle and they died Id copula. 



The Leather Beetle (Dn-mrsies niJpinus Fab.), a Troublesome 

 Pest of Dried Fish in Hawaii. 



BY .1. F. ILLIXGW()RTII. 



This cosmopolitan 1 )ermestid is an important ])est of dried 

 hsh in Honolulu, as was recently brought to my attention l)y 

 Mr. ]\r. B. Eairos, Territorial Food Inspector, X(jv. 15, 1910. 



Proc. Haw. Ent. Soc, III, No. 5, April, 191^ 



