No.4o2.] WORTH-AMERICAN INVERTEBRATES. 517 
THE SPECIES OF MATUTID. 
Genus Hepatus Latreille. 
Key to Species. 
A. Carapace marked with large patches of color, margined by darker 
lines. Length of penultimate segment of abdomen of male two- 
thirds its proximal width . . . H. epheliticus (Linneus), MSG 
A’. Carapace marked with transverse lines of small, dark spots. Length 
of penultimate segment of abdomen of male three-fourths its proxi- 
mal wid cig X39 ee e a ae H. princeps (Herbst), S 
Genus Osachila Smpsan IUS CO... «4 0 NIMES Sümpson, G 
KEY TO THE GENERA OF THE FAMILY LEUCOSIID. 
A. Merus of external maxillipeds more than half the length of the ischium 
measured along the inner border. Fingers stout, gradually narrow- 
ing from base to tip. 
B. Little or no space between the edge of the floor of the orbit and 
the free edge of the buccal cavern. 
C. Intestinal region without a spine. Merus of external maxilli- 
peds nearly as e as the ischium measured along the 
inner border . . xo. PHA 
C'. Intestinal region with : a Res spine. Meu of external maxil- . 
lipeds much shorter than the ischium measured along the 
inner border . . Persephona 
5. A considerable space bein thie eii of the lower wall of the 
orbit and the free edge of the buccal cavern. 
C. Carapace almost circular and globular . . . . Randallia 
C^. Carapace polygonal; surface very uneven . . - Lithadia 
A’. Merus of external maxillipeds half or less than half the length of the 
ischium measured along the inner border. Fingers slender, almost 
of the same diameter from base to near tip. 
B. Fingers moving in a vertical plane. Pterygostomian channels 
oil 
projecting considerably beyond the orbits . . . Iliacantha 
B'. Fingers moving in a horizontal plane. Pam channels 
not projecting beyond the orbits . . Myropsis 
THE SPECIES OF LEUCOSIID. 
Genus Philyra Leach o o i.. . Z fitum de Haan, P 
Genus Persephona Leach. . . . P. dpi (Linnzus), M(CH )SG 
Genus Randallia Stimpson . . . . ornata (Randall), PD 
Genus Lithadia Bell. 
