MORGAN HEBARD 103 



under the same conditions at San Ysidro, but on a different date. 

 In the six other cases lief ore us of material from nests of small 

 sized ants, however, the crickets are cither small innnatures, 

 small or very small adults. 



That immature and adult crickets inhabit the same ants' nest 

 is shown by a number of cases in the present series. 



The normal general coloration for oregonensis is as follows: 

 Pronotum and proximal abdominal segments cinnamon brown, 

 rapidly becoming darker caudad, so that the major portion of 

 the dorsal surface of the abdomen is mummy l^rown. Head 

 mummy brown. Palpi, underparts and limits paler, Inickthorn 

 brown with an ochraceous-tawny tinge. Antennae of the liml) 

 coloration proximad, darkening to cinnamon brown. Cerci of 

 the limb coloration, often more strongly tinged with ochraceous- 

 tawny. As in pergaudei, the dorsal surface and appendages are 

 rather thickly supplied with minutely microscopic golden scales. 

 These are easily rubbed off and have completely disappeared 

 in some of the alcoholic material at hand. 



Individuals of recessive coloration have the dorsal surface 

 ochraceous-tawny, becoming darker only distad on the abdomen. 

 The immature individual from Humboldt Count}^, California, is 

 exceptionally pale, as pale as is normal for tnanni. 



Specimens Examined. — 93; 21 males, .51 females and 21 immature indi- 

 viduals. 



British Columbia: (G. W. Taylor), 1 c?, 1 9, [Hebard Cln.]. Welling- 

 ton, Vancouver Island, III, 18 to IX, 24, 1900 to 1904, (G. W. Taylor), 1 

 small d", 2 small 9 , 1 large 9 , 1 juv.; VIII, 8, 1906, (A. N. Caudell), 1 juv., 

 [all U. S. N. M.]. Nanaimo, Vancouver Island, VIII, 7, 1906, (A. X. Caudell), 

 2 small juv., [U. S. N. M.]. 



Washington: San Juan Island, VII, 1 to 7, 1909, (W. M. Mann), 1 large cf , 

 (host = Camponotus herculeanus modoc Wheeler), [Hebard Cln.], 2 large 

 juv., (host = Formica fusca var. neorufibarbis Emery), [Mann Cln.]. Seattle, 

 (T. Kincaid), 1 large c?, 3 large 9, ] large juv., [U. S. N. M. and Hebard 

 Cln.]. Tenino, (H. G. Hubbard), 1 medium cf, (host = Formica fusca var. 

 argentea Wheeler), [U. S. N. M.]. 



Oregon: Divide, IX, 12, 1897, (A. P. Morse), 2 large 9 , [U. S. N. M. and 

 Hebard Cln.]. 



California: Bair's Ranch, Redwood Creek, Humboldt County, VI, 12, 

 (H. S. Barber), 1 small pale juv., [U. S. N. M.]. Placer County, IX, 1 large 9 , 

 paratype of M. formicarum Sc, [Hebard Cln.]. El Dorado County, II, 2 

 medium 9, 1 paratype of M. formicarum Sc, [both Hebard Cln.]. Lake 

 Tahoe, VII, 1915, (for W. M. Wheeler), 1 medium large c?, 1 medium large 9 , 



TRANS. AM. ENT. SOC, XLVI. 



