NEW AiMKRICAN ACAKINA. 219 



body, length of legs, and of the bristles on the cephalothorax are of 

 secondary importance. Our forms are carnivorous and live free, 

 but there are some parasitic species in Europe. Three genera are 

 known to me : 



1.— Falpi three-jointed Kiipailims. 



Palpi five-jointed -• 



2. — Last joint of palpus forming a strong elaw XciriiN. 



Last joint of iialpus blunt B<l<'lia. 



Bdella and Scirtis are q'lite similar, except in form of the palpus ; 

 Eupalpns has the palpi much smaller appressed to the short mandi- 

 bles, and the cephalothorax is much less distinct from the abdomen 

 than in the other genera. Say described a species of Bdella (B. 

 oblonga) from Georgia, and Packard a form from the sea -shore of 

 New Jersey (B. marina). I have never seen B. oblonga, but have 

 collected B. marina and three other species on Long Island. 



1. — Last joint of palpus widened at tip, hairs at end very much longer than the 



joint cardinal is. 



Last joint not widened at tip, hairs only as long or shorter 2. 



2. — Hairs about as long as the joint robiista. 



Hairs distinctly shorter 3. 



3. — Joint two of palpus about twice as long as joints three plus four. ..marina. 

 . Joint two three times as long as three plus four pcrc^riiia. 



Bdella cardiiiiiliK nov. sp. — Length 1.2 mm. Eed ; the mandibles are 

 about as long as the cephalothorax, and the latter is a little broader than long, 

 the sides convex ; there are two bristles above on each mandible, one near the 

 base, and the other about one-third the distance to the apex. The second joint 

 of the palpus is about three-fourths the length of the mandibles, it has a few 

 short bristles; the next two joints are subequal, about as broad as long: the fifth 

 joint about OTie-third longer than joints three plus four, and not one-half as long 

 as joint two, it is widened at the tip and bears on the end two very long bristles. 

 the outer one about as long as the mandibles, the inner one shorter, near the tip 

 of the joint on the innerside are two short bristles. The cephalothorax lias two 

 bristles in front, and two near the posterior angles. The abdomen has a row 

 each side, a few on the middle, some at tip, and a prominent one on each shoulder. 

 The legs have many bristles, but quite short, except some on the fourth pair. 



Living in the woods under leaves, in moss, and under rotten wood. 



Sea Cliff, N. Y. ; Ft. Lee, N. J. Apparently the same species 

 from Chicago, 111., and from Franconia, N. H. (Mrs. A. T. Slosson), 

 but the specimens are mutilated. 



Bdella peregriiia nov. sp. — Length 1.7 mrn. Red ; niandibli.-s longer 

 than the cephalothorax, which is a little broader than long, the sides slightly 

 concave near the front; each mandible has but one bristle above near the tip. 

 The second joint of palpi is three-fourths as long as the mandibles, and has each 

 side about five stiff hairs; joints three and four subequal, as broad as long: the 



TKAN8. AM. ENT. SOC. XXI. JUNE, 1894. 



