Kl.ACKS: CoiJ-.oI'lKKA OK SoU THWES TKKN PkNNSVLVANM A. '277 



C. comptum dis. — Not very scarce. Has been found especially 

 in leaves, heaped up against the base of large boulders on the Chest- 

 nut Ridge, and along the steep hillsides of the Loyalhanna Valley. 



C. pallidum Ciis. — Besides a cotype, there is but one other si)eci- 

 men from this neighborhood before me at present. Others will prob- 

 ably be found in my mounted, but unstudied material. It has oc- 

 curred here under decomposing vegetation. 



C. decorum Cas. — Not scarce in situations and localities similar to 

 those in which oreof^Jiiliiin and comptum are found ; the species usually 

 occurring together, but not associated. 



C. testaceipes Cas. — The cotype is the only specimen from this 

 neighborhood now in my collection, and I have kept no record of its 

 capture. 



C. triviale Qis. — Sifted from layers of dead leaves, in woods, 

 March 29, 1S95. 



C. castaneum Cas. — A single specimen, the cotype, collected at 

 CarroUtown (Rettger). 



C. parcum Cas. — The types are obtained here by sifting. 



C. biceps Cas. — This tiny thing is the most remarkable of this 

 great and complicated genus. My specimens have all been found 

 here either singly, or in twos or threes at rare intervals, in rotten logs. 

 Over a dozen have been obtained, the first on April 15, 1895. 



C. caviceps Cas. — Another remarkable minute syjecies, occupying 

 a place apart from all others of the genus. I have but once taken a 

 colony of small specimens, from the rotten stump of an oak. A large 

 portion of the wood was riddled by the galleries of ants {Lasius aphi- 

 dicohi), which occurred numerously. A few other Scydmcenidce, and 

 several species of Pselaphida, were also obtained by this sifting. 



C. trinifer Cas. — This was formerly supposed to be but a variety of 

 the next species ; it is, however, easily distinguished from it by its ob- 

 viously larger size and other characteristics. 



C. fulvum Lee. — This and the preceding species are the two most 

 abundant species of the genus Connophron in western Pennsylvania, 

 and both are widely distributed over the Eastern and Middle States. 

 Both frequent decaying logs of various kinds of wood, and with C. 

 affinis can be found at all seasons. 



C. bifidum Cas. — Besides a cotype, I have specimens taken from a 

 rotten hickory log, and others taken October 5, 1899, from layers 

 of dead leaves, all being found on the sloping hills along the banks of 

 the Loyalhanna in the mountains. 



