MORGAN HEBARD 



109 



material on which Scudder based nehawkae. Thus we find great 

 depauperation governed by the small size of the host ant in all 

 of the North American species of Mynnecophila. 



The different armament of the caudal tibiae and metatarsi 

 readih' distinguishes nebrascensis from the other forms found 

 in the United States, excepting as to the tibiae of occasional 

 Arizonan individuals of manni, as discussed under that species. 

 In coloration close agreement with M. manni Schimmer is found, 

 though a Ixmdcd condition is apparently more frequently en- 

 countered in the present species. For this reason material from 

 Arizona must be carefully examined in regard to the spine for- 

 mulae, particularly of the caudal metatarsi, as in that geographic 

 area the distributions of manni and nebrascensis overlap. 



An extremely interesting account of the habits of this species 

 has been given by Dr. W. M. Wheeler.^^ 



Measurements {in millimeters) 



Length 



Length Width Length Width of 



cf of of of of caudal 



body body caudal caudal meta- 



femur femur tarsus 



West Point, Nebraska, topo- 



tijpe'^ 2.04 1.5 1.53 1.08 (Xl.4H-)w .75 



West Point, Nebraska, /opo/^/x' 1.97 1.4 1.4 1.06(X1.32 + ) .75 



Weeping Water, Nebraska^" .. . 1.77 .75 1.04 .71 (X 1.47— ) 



Austin, Texas 2.38 1.43 1.5 .95 (X1.58— ) .74 



Las Vegas, New Mexico 2.18 1.47 1.43 .97 (X1.47 + ) .74 



Oracle, Arizona 2.04 1.16 1.22 .73(X1.67 + ) 



Oracle, Arizona 1.74 1.02 .95 .62(Xl.53 + ) .476 



Huachuca Mountains, Arizona. 1.3 .88 



Huachuca Mountains, Arizona. 1.5 .95 • 



Length 



Q of 



+ ovi- 



positor 



West Point, Nebraska, /o/w/y/x' 2.31 1.43 1.3S .95 (XI. 45 + ) .95 



West Point, Nebraska, /opo/ype 2.86 1.63 1.53 1.09(Xl.40 + ) 1.22 



Weeping W\ater, Nebraska^i. .. 2.04 1.09 .97 .66 (X 1.47—) .76 



Weeping Water, Nebraska'". . . 1.5 .95 .71 



Ponca City, Oklahoma 1.97 1.16 .71 



" Psyche, ix, pp. Ill to 115, text fig., (1900). 



1^ See original reference. 



" Number of times width of caudal femur is contained in its length. 



-" Para type of the synonymous M. neliawkae Scudder. 



^^ Type of the synonymous M. nehawkae Scudder. 



TRANS. AM. ENT. SOC, XLVI. 



