THE CANADIAN ENTOMOLOGIST. 385 



Anal legs both in male and female long and slender. 



Genital appendages of male long and cons})icuous; composed of three 

 distinct articles, of which the ultimate is conical and terminates in a stout 

 bristle. 



Claw of gonopods of female undivided; basal spines 24-2, conical 

 distally, cylindrical or somewhat clavate proximally. 



Length of male, 10.5 mm.; width at eighth dorsal plate, 1.4 mm. 

 Female shorter, in length 8.5 mm., and more slender, the width at eighth 

 dorsal plate being i.i mm. Length of anal legs in male ad 4.6 mm. 



Localities. — Berkeley and Mill Valley. 



This is the second species of Buethobius to become known. In the 

 case of the type species, B. oabitiis Chamberlin, found in Mississippi, all 

 the specimens found had the gonopods terminating in claws, thus appear- 

 ing to be females. The character of the aj^pendages in the male is 

 interesting, these appendages differing from those in the female only in 

 lacking the terminal claw and the basal spines. It may be found that in 

 Lamyctes, Zygdhobius, etc., even these differences do not occur, and that 

 the males and females have not been distinguished heretofore in 

 consequence. 



THE POTATO BEETLE, DORYPHORA DECEMLINEATA, 

 EATING THE EGGS OF ITS KIND. 



While ridding some early potatoes of beetles at Westbrook, Maine, 

 in June, 191 1, masses of their eggs were frequently noticed, which had 

 part or all of their contents emptied, leaving the shrivelled coverings on 

 the leaf My curiosity was aroused, but was shortly to be satisfied. In 

 the large tin pail into which the egg-bearing leaves and the beetles were 

 thrown, one of the latter was noticed feasting upon the eggs. There was 

 no mistake. With her mouth-parts upon an egg, and with jaws and 

 antennae wot king, the egg was seen to collapse, and she moved to the 

 next, with like result. During the next half-hour not less than a dozen 

 were carefully observed feeding on the eggs in the pail. 



It may be of interest to remark that only females were observed to 

 do this. — Arthur H. Norton, Museum of Natural History, Portland, Me. 



Errata. — Page 356, explanation of fig. 23, line i, for "b" and "d'' 

 read "c ;" line 2, for "c" read "b and d ;" line 3, for "d" read "e." 



