Kl.AGES: COLEOPTKRA OK SoU rHWF.STKRN Pr.NNSVLVANI A. '283 



B. fossicauda Qis. — Abundant in the nest of the ants mentioned in 

 the first list ; il feedson the " springtails " that swarm in the ant-nests, 

 and 1 have several times captured specimens in the nest, in the act of 

 devouring their prey. Not a single specimen has been taken by me 

 outside of the ant-nests, though I have seen specimens sitting at the 

 entrance of the nests, or walking speedily from one entrance to another, 

 or hurrying about on the earthwork as if ready to take wing. These 

 observations were made about two hours before sunset. The ants seem 

 to take no notice whatever of the beetles, nor do these concern them- 

 selves with the ants. I am of the opinion that the Batrisi, and the 

 Pselaphidce generally, may be e.\pected to occur in greatest numbers 

 in those situations in which the Podnridcc most abound. 



B. denticollis Cas. — Seems to be restricted to a very limited num- 

 ber of localities. 



Arianops amblyoponica Bremi. — Long and patient search is re- 

 (juired to collect a few specimens of this fine blind beetle, and my later 

 observations confirm me in believing it to be myrmecophilous, for I 

 have always found it near, or in the galleries of Stigmatomuia {A/ii- 

 blyoponc) pallipes\\.2\di. The type described by Dr. Brendel is a male, 

 not a female, as erroneously stated in the first list. 



Decarthron abnorme Lee. — Not rare under heaps of dead weeds, 

 etc., along fences, and one of the few Pselaphidtc which I have taken' 

 on the wing an hour or so before sunset. 



D. longulum Brend. — Referred to as a new species in Dr. Hamil- 

 ton's list, and identified for me some years ago as louguhim by Capt. 

 Casey. No specimens have since been found. 



Rubaxis conjuncta Lee. — Not abundant ; the specimens taken here 

 show no variation. 



Bryaxis arguta Cas. — This is B. perforata of Dr. Hamilton's list. It 

 has been taken here and on the Chestnut Ridge with the sweeping net 

 toward evening. It is rare. 



Reichenbachia semirugosa Brend. — Only the two type specimens 

 are known to me to have been captured here. 



R. rubicunda Aube. — Not scarce in dead leaves and weeds piled up 

 under bushes and about logs ; it is less frecjuently found under stones 

 in wooded land. 



R. inepta Cas. — Two examples under stones in pasture on the slope 

 of a hill. 



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