OF WASHINGTON. 25 



Cephcnnium anophthalmicum Brend. Found under vegetable debris in 

 Alameda Co., Cal. 



Adranes coecus L/ec. Virginia, Pennsylvania and Western States. 

 vStrictly myrmecophilous. The specimens found by myself occurred 

 in a colony of Lasius alienus under the loose bark of an old pine 

 tree. 



Adranes Lecontei Brend. Michigan, Illinois, Iowa. Strictly myrme 

 cophilous. Specimens were found by Mr. Hubbard in a rotten log 

 among Lasius umbratus* 



Eutyphlus similis Lee. ( Nicotheus tibialis Casey). Mountains of Virginia 

 (Mountain Lake, Ulke ; Pennington Gap, Hubbard) and Maryland 

 (Deer Park, Schwarz) ; Washington, D. C. Occurs under deep 

 layers of old leaves. The eyes are more or less rudimentary, some 

 times almost entirely absent. 



Ptinclla pini Lee. 



Ptinclla quercus Lee. These two closely allied species live under moist 

 bark of old stumps, and are widely distributed in the Atlantic and 

 Western States, occurring from Canada and Michigan to Alabama 

 and Florida. There are blind and wingless specimens among them, 

 as well as winged ones provided with distinct eyes. These latter 

 specimens are, according to Mr. Matthews, the females, and the blind 

 specimens the males. Mr. Reitter asserts the contrary, while Mr. K. 

 Flach (Wien. Bnt. Zeit., viii,, 1889, p. 218) concludes that both forms 

 occur in both sexes, but so that a stationary, blind and wingless gen 

 eration alternates with a migrating generation which is winged and 

 provided with eyes. P. quercus usually occurs in large colonies, of 

 which, in my experience, the majority of the specimens are blind 

 and wingless, while in each colony always a few specimens with eyes 

 and wings can be found. This would seem to speak against Mr. 

 Flach 's theory. 



Ptinellodes Lecontei Matth. Under bark of deciduous and coniferous 

 trees, as well as under old leaves in Georgia and Florida. It does not 

 seem to live in large colonies, but, as the preceding species, occurs in 

 two forms, one provided with distinct eyes, and the other entirely blind. 



Limulodes paradoxus Matth. Of this only blind specimens are known. 

 A strictly myrmecophilous species (among Lasius aphidicola and no 

 doubt other species of Lasius}, and widely distributed in the Atlantic 

 and Western States. 



Colydiidcz. A remarkable undescribed species with rudimentary eyes, 

 and constituting, no doubt, a new genus, f has been found in middle 

 California. I know nothing of its habits. 



* A remarkable blind genus of Pselaphidez , allied to Batrisus, has re 

 cently been described by Dr. Brendel as Anops amblyoponica. It occurs 

 in Pennsylvania in the nests of a blind ant, Amblyopone pallipes. 



t Since described by Capt. Casey as Megataphrus tenuicornis. 



