1919.] NATURAL SCIENCES OF PHILADELPHIA. 113 



consider paratypes. These are located in the Hebard Collection 

 and that of the Academy of Natural Sciences of Philadelphia. 



Morphological Notes. — As already shown, the present race is a 

 shorter, relatively more robust form than M. mac. maculi'pennis. 

 It shows much less variation in the morphological features men- 

 tioned under the typical form of the species than does the latter, 

 while such progressive elongation and slenderness as is there evi- 

 dent is not found in typical macclungi, being, apparent only in 

 the individuals intermediate in character between M. mac. maculi- 

 'pennis and M. mac. macclungi. The extremes of both sexes in 

 three representative fair-sized series show variations in the fas- 

 tigial (horizontal) angle as follows: cf ; Forsyth, Montana, 71.5°, 

 87°; Fort Collins, Colorado, 68.5°, 76°; North Platte, Nebraska, 

 77.5°, 87°: 9 ; Forsyth, Montana, 84.5° (no variation); Fort Col- 

 lins, Colorado, 85°, 87°; North Platte, Nebraska, 80.5°, 89.5°. 



Synonymy. — The general misidentification of this form as hi- 

 vittata has already been discussed. Caudell's reference of Fort 

 Collins material of this race to M. texana was an error in identifi- 

 cation, as the material, now before us, shows. 



Measurements (in millimeters). 



Length of Length of Length of Length of 

 cT body. pronotum. tegmen. caudal femur. 



Forsyth, Montana, /!/pc 26 4.5 19.7 16.3 



Forsyth. Montana, para/T/pe 26.2 4.3 18.8 16 



Forsyth, Montana, paratype 29.3 5 21.6 17.4 



Julesburg, Colorado 25.3 4.5 19.6 16 



Julesburg, Colorado 27.3 4.3 19.7 15 



Fort ColHns, Colorado 27.2 4.4 19.2 15.9 



Fort Collins, Colorado 30.8 4.8 20.8 16.9 



Pueblo, Colorado 29.3 5 21.2 18.1 



Pueblo, Colorado 32 4.9 23.6 19 



Glen, Nebraska 21 4.2 19.7 15 



Glen, Nebraska 27.2 4.5 19.2 16.1 



North Platte, Nebraska 25 4.1 18.9 15.8 



North Platte, Nebraska 27.4 4.5 19.4 16 



West Point, Nebraska 26.1 4.5 19.8 15.6 



West Point, Nebraska 28.4 4.9 22 17.8 



Salt Lake City, Utah 28 4.6 18.3+ 17 



Salt Lake Valley, Utah 28.5 4.7 20.5 17.3 



9 



Forsyth, Montana, allotype 43.6 6.6 28.5 22.5 



Forsyth, Montana, paratype 45 6.5 28.5 22.2 



Glendive, Montana 41.2 6.5 27.7 21.8 



Julesburg, Colorado 37 5.5 27.5 21.2 



Fort Colhns, Colorado 38.3 6.3 30.8 23.7 



Fort Collins, Colorado 40.5 6.5 28.2 22.3 



Pueblo, Colorado 40 6.7 31 25.4 



Pueblo, Colorado 41 7 32.3 25.2 



Glen, Nebraska 36 6.3 27 22.4 



8 



