110 NORTH AMERICAN MYRMECOI'HILA (oRTHOPTERA) 



LeiiKth Width Length 



LciiKth Width of of of 



of of caudal caudal ovi- 



body body: femur femur! positor 



Austin, Texas 2.58 1.63 1.56 1.02(X1.53— ) 1.02 



Las Vegas, New Mexico 1.63 1.06 .88 .61 ( X 1.44 + ) .72 



Las Vegas, New Mexico 2.11 1.63 1.43 .97(Xl.47 + ) 1.16 



Oracle, Arizona 2.45 1.54 -85 



Oracle, Arizona 1.7 1.02 .65 



It appears that geographic factors have little to do with 

 size variation in this species. In the present series there is a 

 larger percentage of depauperate material, from nests of small 

 sized ants, than in any other of the other species here treated. 



The general coloration of this species is clay color on the dorsal 

 surface, cinnamon-buff on the ventral surface. Frequent speci- 

 mens have the dorsal surface of the abdomen slightly darker at 

 the caudal extremity. The eyes are blackish brown. The minute 

 microscopic scale covering is moderately thick, the scales golden. 



Frequent individuals of both the large and depauperate con- 

 ditions have the caudal margins of the dorsal segments broadly 

 but not strongly darkened. Such material, in consequence, has 

 a banded appearance. This was supposed l)y Scudder to be 

 peculiar to the depauperate condition, which he described as a 

 distinct species, nehawkae. Such is not the case. 



Much of the Arizonan material is of a maximum recessive 

 coloration, light ochraceous-buff above and below. No trace 

 of banding is shown by any of this material. 



Specimens Examined. — 82; 25 males, 37 females and 20 immature indi- 

 viduals. 



Neurask.-v: West, Point, V, 6 and 9, 1891, (L. Brmier), 4 cT, 8 9, large 

 and medium large, lyp', [Ilcbard Cln. and U. S. N. M.]. Weeping Water, 

 (L.Bruner), 3 cT, 11 9,2 juv., small to very small, typ:', allotype, one paratype 

 and to polypes of M. nehawkae Scudder, (host = Tapinoma sessile 8ay), [lleh- 

 ard Cln., A. N. S. P. and U. S. N. M.]. 



Oklahoma: Ponca City, IX, 21, 1906, (A. C. Burrill), 1 small 9, (host = 

 Crcmalogaster lineolaki Say), [Wheeler Cln.]. 



Tkxas: Austin, I, 26, 1903, II, 28, 1919, HI, 1900, (W. M. Whceler^^), 

 3 cT, 1 9, large, (host = Formicn ruftbarbis var. gnava Buckley), 5 cT , 5 9, 

 large to medium large, [A. N. S. P., Wheeler and Hebard C'lns.]. 



--' Dr. W heeler slates (liat in tlie vicinity of Austin, this sjjccies "is most 

 al)uniiant in coin])any with Formica fusca var. neonijibarbis Mayr, less 

 al)undant i!i tlie nests of the Texan agricultural ant {Pogonomyrmex barbatus 

 Sin.) —and rare in nests of Camponolus caslaneits Latr., the Ponerine Fachy- 

 condyla harpax Fahr. and a species of Crematogaster." That author also states 

 that the males of nrbrascrnsi'i in the vicinity of Austin, bear to (he females 

 the ratio of about one to seven or eight. 



