4 Psyche [February 



anterior border on the dorsal surface; the fourth, fifth, and sixth 

 segments are black (male) , but the fourth has an irregular reddish- 

 yellow band extending over its full length on the right side above, 

 and the fifth has a small spot of the same color on the same side 

 at the anterior margin. On the ventral side the first segment is 

 black throughout, the second with an oblique reddish-yeUow blotch 

 to the left of the median line, the third with a narrow black longi- 

 tudinal streak in the middle and a large rounded black spot on the 

 left posterior corner. The fourth ventral segment is entirely 

 black and very small, the fifth yellow. External genitalia of the 

 male type, much as in normal individuals but more robust and 

 turned somewhat to the right side. Sculpture, pilosity and pubes- 

 cence of the gaster as in the male. Legs very peculiar in that the 

 hind pair, including their coxse, are of the normal female form, 

 pilosity and color, whereas the right fore leg and left middle leg, 

 including their coxse, are entirely black and in form intermediate 

 between the male and female types though somewhat more like 

 the latter in form and size. Left fore leg black on its extensor and 

 reddish yellow on its flexor surface and more nearly like the nor- 

 mal female fore leg in form than the right fore leg. Right middle 

 leg much more like that of the female than the left middle leg, 

 the coxse and femur black, the latter with a long fusiform reddish- 

 yellow spot on its extensor surface, the tibia and tarsus reddish- 

 yellow throughout as in the female. The pilosity on the legs is 

 short and sparse (male), except along the flexor border of the left 

 fore tibiae and on the hind legs where the hairs are long and of the 

 female type. Both pairs of wings are normally developed and in 

 size and shape as in the female, but the hind pair dropped off read- 

 ily soon after the specimen was placed in alcohol, whereas the fore 

 pair remain firmly attached, showing a pronounced tendency to 

 dealation (female) only in the metathoracic articulations. The 

 fore pair has the posterior half of the recurrent vein absent. This 

 reveals a condition half way between those of the normal female 

 and male, since in the former the recurrent vein is complete and 

 closes the discoidal cell, whereas in the male it is usually entirely 

 absent so that the wing is without a discoidal cell. 



The unusual interest of the specimen lies in the fact that it can- 

 not be placed in any of the categories of gynandromorphs, for as a 

 whole it belongs neither to the more frequent lateral, nor to the 



