490 PROCEEDINGS OF THE ACADEMY OF [Nov., 



NEW ORIBATID^ FROM THE UNITED STATES. 

 BY NATHAN BANKS. 



The Oribaticlce, or "beetle-mites" as they have been called because 

 of their hard teguments, have been but little collected or studied in our 

 country. In 1895 the writer described those he had observed on Long 

 Island, N. Y., and a few others. In 1896 a few more were added to the 

 list. Now I describe twenty-four more, from various parts of the country. 



Our Oribatid fauna is similar to that of Eiu-ope, so far but one or 

 two peculiar genera; but we have a larger percentage of smooth species, 

 as Galumna, Oribatula, and fewer of the roughened species, as Notaspis, 

 Nothrus, and Cepheus. The genus Pelops, represented in Europe by 

 ten or twelve species, has not yet been found in North America. 

 Galumna slossonae n. sp. 



Color, dark brown, a pale spot at base of abdomen, legs pale. Cepha- 

 lothorax with a long lamella each side, its apical third free and pointed, 

 bearing a rather short bristle; a narrower lamella or ridge on each outer 

 edge, ending in a short bristle ; superior bristles long, erect ; pseudostig- 

 matic organ long, clavate at tip. Abdomen longer than broad, smooth, 

 with six rather thickened bristles each side, two toward humerus, four 

 near tip ; wings quite long, not one-half as high as long ; genital opening 

 about twice its length in front of the larger anal opening; sternum 

 with three lines each side, middle pair longest. Legs quite long antl 

 slender; femora I and II very broad, femur II with a pointed lobe at 

 tip beneath; all tibiae with two stout spines at tip, one on patella II, 

 and one below tarsi IV; three strongly unequal claws, the middle one 

 xery much larger than the others; a large tectopedium behind coxa I. 



Length .5 mm. 



From Franconia, N. H. (Mrs. A. T. Slosson.) 



Galumna unimaculata n. sp. 



Color, red brown, a yellowish spot at base of the abdomen. Cepha- 

 lothorax with a rather broad lamella each side, its apical fourth free, 

 tip slightly emarginate, and with a short bristle ; superior bristles rather 

 fine, long; pseud ostigmatic organ not very long, clavate at tip. Abdo- 

 men large, globose, rather longer than broad, four pale smooth spots 

 on each side, the basal pair much larger than the others; nine bristles 



