MORGAN HEBARD 99 



In the material liefore us, the series of largest examples of this 

 species were taken with the largest ants, Cmn-ponotus herculeanus 

 Linnaeus; the smallest examples with small ants, Cretnatogaster 

 Jineolata Say. We believe that, in pergandei, geographic influ- 

 ences have little or nothing to do with the considerable size varia- 

 tion shown by this species. It does appear, however, that the 

 size of the ants in a nest has a decided effect on the individuals 

 of this cricket living in the same. The differences in size among 

 adults from the same colony of pergandei is ascribable to indi- 

 vidual variation. 



In general coloration individuals of this species are as follows: 

 Dorsal surface dark chestnut l)rown, shading to chestnut l)rown 

 on all l)ut margins of pronotum antl proximal portions of prox- 

 imal abdominal segments, well supplied with microscopic golden 

 scales. Paired generic pronotal markings faintly outlined in a 

 slightly paler shade, this rarely noticeable to the naked eye and 

 sometimes subobsolete. Ventral surface, limbs and antennae 

 buckthorn brown, except caudal tibiae and caudal femora dorso- 

 proximad, which are slightly darker. Cerci ochraceous-tawny. 

 In recessive examples of the present species the dorsal surface is 

 russet, with paler areas tawny. The maximiun recessive con- 

 dition in the series is shown by the specimens from Raleigh, 

 North Carolina, which are almost entirely pale ochraceous- 

 tawny. 



Specimens Examined. — 73; 32 males, 23 females and 18 immature indi- 

 viduals. 



Maryland: Gray's Farm, Linden, Montgomery County, (W. V. Warner), 

 1 large 9, (host = Formica truncicola ohscuriventris Mayr), [U. S. N. M.]. 

 Plummer's Island, XI, 20, 1903, (A. N. Caudell), 1 small juv., (host = Crema- 

 togaster lineolata Say); X, 13, 1911, (J. D. Hood), 1 large 9, (host = Ccunpo- 

 notus herculeanus lignipcrda var. novehoracensis Fitch), [both U. S. N. M.]. 



District of Columbia: Washington, IV, 22 to VI, 1885, (L. Bruner), 

 5 c?, 4 9,4 juv., type, allotype and 8 paratypes, (hosts = Camponolus her- 

 culeanus pennsylvanicus DeGeer, Formica pallidefulva Latreille and (one 

 immature with) Crematogaster lineolata Say), [Hebard Cln.]; VI, 19, 1911, 

 (Wm. T. Davis; under bark of log), 1 juv. d", 1 juv. 9 , (host = Crematogaster 

 lineolata Say), [Davis Chi.]. MulUgan Hill, Washington, IV, 2, 1916, (H. S. 

 Barber), 1 small cT, (host = Camponolus castaneus Latreille), [U. S. N. M.]. 



Virginia: XI, 1883, 1 small juv., (ho.st = Crematogaster lineolata Say), 

 [Hebard Cln.]. Great Falls, VI, 11, 1910, (Wm. T. Davis), 2 large 9, 1 

 juv. 9, (host = Formica pallidefulva Latreille), [Davis Cln.]. Hot Springs, 



TRANS, am. ENT. SOC, XLVI. 



