No. 400.] MORTH-AMERICAN INVERTEBRATES. 305 
Genus Alloniscus Dana. 
a. Surface of body very densely granulated. Margins of epimera serrated. 
Alloniscus mirabilis Stuxberg, California 
a’. Surface of body punctate. 
6. Lateral processes of head large, prominent. 
— Alloniscus cornutus RRA California 
V. Lateral processes of the head small, scarcely prom 
Alloniscus dedi Debe Or., Cal. 
Genus Philoscia Latreille. 
4. Body smooth, without spines. 
4. Body striped with two broad dorsal bands. 
Philoscia vittata Say, North America 
&. Body not striped, but dotted with numerous spots 
c. Frontal marginal line straight. Color varying from black to 
brown, with white spots. 
Philoscia nigricans Budde-Lund, Louisiana 
c’. Frontal marginal line produced in the middle, a little arcuate. 
, Color violet, with white spots. 
‘Philoscia brevicornis Budde-Lund, Louisiana 
a’. Body with numerous spines above . Philoscia spinosa Say, Georgia 
Genus Oniscus Linnzus. 
a. Caudal segment a Bue shorter than inner branch of the uropoda. 
Oniscus asellus Linnaeus, North America 
4'. Caudal segment exactly equal to the inner branch of the uropoda 
Oniscus affinis Say, North America 
Genus Lyprobius Budde-Lund. 
Lyprobius pusillus Budde-Lund, California 
FAMILY XX. ARMADILLIDID. 
4. Outer branch of the uropoda small or very small, smooth. Clypeus 
with the superior margin entire, lobated at the sides. First thoracic 
segment, often the second also, with the epimera posteriorly cleft, 
rarely entire. Exterior opercular branch of all the pleopoda furnished 
trac b 
a’. Outer Vivi of the uiios iiti flattened, tankaliee Clypeus with 
the superior margin lightly sinuated, not lobated. Epist of the 
first thoracic segments simple, entire. Exterior opercular branch of 
the first and second pairs of pleopoda furnished with tracheæ. 
Armadillidium Brandt 
Genus Cubaris Brandt. . Cubaris cali d Semaine California 
baris affinis (Dana), California 
NEA Piin pisum (Bndide- Lund), Florida 
Genus Armadillidium Brandt. 
Armadillidium vulgare (Latreille). North America 
