420 SNODGRASS 



Prothoracic coxa, trochanter and femur black, with a yellow stripe 

 along the anterior outer border extending two thirds of distance to dis- 

 tal end of femur. Tibia and tarsus mottled with yellow and black. 

 Mesothoracic legs same as prothoracic except that the lighter color is 

 orange rather than yellow. The pattern of the coloration of the nieta- 

 thoracic femur is of special importance because the modifications it 

 undergoes amongst the different varieties are of a definite and graded 

 sort. Its ground color is black and the markings are as follows : 

 along the median dorsal and the lateral outer and inner lower carinae 

 a very fine line of bright lake red ; just above the outer lower carina a 

 wide yellow stripe reaching a short distance back of the middle of the 

 femur ; a corresponding red line along the inner lower carina ; saddled 

 across dorsal surface from one upper carina to the other two large 

 pale-red quadrate areas, the anterior the larger and separated from 

 the posterior by a space equal to length of the latter, posterior border 

 of second area lies just above caudal end of lower outer yellow 

 stripe ; continuous with the outer anterior angle of the anterior 

 red area a yellow stripe running forward just above the outer upper 

 carina to the cephalic end of femur where it curves downward so as 

 almost to meet the lower yellow stripe ; the lower outer and inner lobes 

 of the posterior end of the femur with a yellow spot, and the upper 

 lobes tipped with the same color, Metathoracic tibia and tarsus bright 

 yellow ; the upper end of the tibia, a row of small spots on the upper 

 half of the outer surface, tips of the spines and tarsal claws, black. 



Proximal halves of all longitudinal veins of tegmina bright lake 

 red, otherwise premedian and postmedian areas of the forewings 

 are distinctly differentiated. Membrane of premedian area pale 

 lemon-yellow distally where most of the reticulations are of same color, 

 but toward basal part of wing they are more yellowish and reddish. 

 Reticulation and membrane of the distal two thirds of the postmedian 

 area dark smoky-brown, while anteriorly the reticulations are yellowish, 

 giving, especially on the side, just above the median vein, a lighter 

 and more differentiated appearance to basal part of wing. Posterior 

 wings pale lemon-yellow with strong infuscation apically. 



Variations (ii specimens). — The majority of the specimens agree 

 very closely with the type. The most frequent divergence is a tend- 

 ency of the second red area of the hind femur to fuse across the 

 lateral black space with the lower yellow stripe. Back of this second 

 red area, there is, in many specimens, a more or less distinctly de- 

 veloped third spot between the second and the tip of the femur. In 

 some the yellow and red colors are paler and the black less intense, 



