90 INDEX TO MISSOURI ENTOMOLOGICAL REPORTS. 



From spretus, again, it is at once distinguished by the smaller size, the more distinct 

 separation of the dark mark running from the eyes on the prothorax and of the pale 

 line from base of wings to hind thigh ; also by the anal joint in the $ , tapering more 

 suddenly and by the two lobes forming the notch being less marked. From both spe- 

 cies it is distinguished not only by its smaller size but by the deeper, more livid color 

 of the dark parts, and the paler yellow of the light parts the colors thus more 

 strongly contrasting. 



6^'s, 9?'s from New Hampshire. Just as the typical femur-rubrum is at once dis- 

 tinguished from the typical spretus by the characters indicated; so Allanis, though 

 structurally nearer to spretus, is distinguished from it at a glance by its much smaller 

 size and darker, more marbled coloring. The contrast is all the greater in the living 

 specimens, and I have seen no specimens of spretus that at all approach it in these 

 respects. 



Whether this is the femur-rubrum as defined by DeGeer or by Harris, it is almost 

 impossible to decide, though Harris's figure of femur-rubrum better represents it than 

 the true femur-rubrum, as subsequently defined by Thomas, and as found in Illinois 

 and Missouri. [Seventh Rept., pp. 169-170. 



For further details and structural differences between it and C. spretus 

 see First Keport of the Commission. 



