. THE CANADIAN ENTOMOLOGIST. 205 



transverse quadrate ; hypopygium armed with an upward curved 

 aculeus (Tribe II., Apterogynini), (Europe, Africa and 



Asia) Apterogyna, Latreille. 



. (Type A. Olivieri, Latr.) 



Abdomen with the first two segments nodiform ; mandible narrowed, 



arcuate, pointed at apex Apterogyna, Latreille. 



GYNANDROMORPHISM IN LUCANUS ELAPHUS. 



BY H. F. WICKHAM, IOWA CITY, IOWA. 



Some time ago, while in St. Louis, I called on Dr. Geo. W. Bock, 

 and saw in his collection a remarkable specimen of a female Lucanus 

 e/aphus, from Poplar Bluff, Mo. On my expressing interest in the matter, 

 the Doctor very kindly gave me the insect, and I wish to put the case on 

 record. 



The chief organ affected is the left mandible (fig. 7 a), which is more 

 than twice the length of the right (fig. 7 b), and partakes of many charac- 

 ters usually exhibited by the male. It is irregularly curved in outline, 

 sparsely punctured, except at the base, where two elongate areas are 

 coarsely and closely punctate, the larger area being on the superior face, 

 while the smaller is lateral. The external face is flattened, trituberculate 

 along the middle region, carinale along the upper and lower margins. 

 The armature of the mandible is as follows : Subbasal and subapical 

 teeth long, as in the male, the smaller intermediate teeth arranged not in 

 one series, but in two, the lower row containing three denticles, one in 

 front of and one behind (but below) the subbasal tooth, the other behind 

 the subapical one ; the upper series consists of five teeth forming a row, 

 as shown in the figure, the second being bifurcate at tip. The antennae 

 are not affected. The head is roughly punctured, somewhat uneven, but 

 without the characteristic ridges of the male. The prothorax is not quite 

 alike on both sides, the left being a little longer and showing a tendency 

 to develop the shape of the male. The front tibije differ from each other, 

 the left being a little narrower than the right, the apical tooth shorter and 

 less excurved, the subapical trifurcate, the two teeth near the middle of 

 the tibia crowded close together. The right middle tibia has four teeth 

 (exclusive of those around the apex), while the left has but two. The 

 hind tibicC are practically alike. 



