546 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



MINCA RUTHVENI, new species. 



Cotype. — Cat. No. 45949, Museum of Zoology, University of Michi- 

 gan. Cat. No. 47945, U.S.N.M. Collected under logs on Cincinnati 

 Coffee Plantation, Sierra Nevada de Santa Marta, Colombia, 4,500 

 feet elevation, July 17, 1913. Orig. No. 111. 



Body finely tuberculate, pubescent toward posterior end; length 

 16 mm., width 7.4 mm. Head not produced into lobes; very short, 

 less than one-third first thoracic segment; more than four times 

 wider than long. Eyes small oval, with about 12 facets, close to 

 lateral margins. First pair of antennae inconspicuous; second pair 

 with the basal segment short, second article two and a half times as 

 long as first ; third one-fifth shorter than second ; fourth nearly twice -l 

 third and sub equal to fifth; flagellum 2-segmented, with the second 

 segment slightly longer. First maxilla with two plumose processes. 



First thoracic somite longer than any other, twice as long as sec- 

 ond, which is subequal to the six following. Coxopodites distinct on 

 the first three segments; on the first in the form of a long carina 

 extending the whole length of the segment but diverging more poste- 

 riorly; on the second and third as short triangular processes. 



Abdomen composed of six somites; first two covered laterally by 

 last thoracic segment. First five somites about equal in length when 

 measured on median line. Terminal segment triangular, obtuse, 

 pointed; posterolateral margins slightly concave. Basal segment of 

 uropoda laminar, tetragonal, extending beyond tip of terminal seg- 

 ment; external ramus minute, conical, inserted near center of dorsal 

 surface of basal segment ; inner ramus linear, acute, reaching beyond 

 tip of sixth abdominal segment and equaling basal segment (fig. 6). 



Color chocolate-brown with median spots and lateral yellowish- 

 white markings, as shown; often the epimera on thorax have white 

 spots. 



One hundred and eighty-one specimens were collected. This spe- 

 cies was abundant under logs on and about the Cincinnati Coffee 

 Plantation. The contents of the stomachs of several individuals 

 were examined through a compound microscope. The food con- 

 sisted of minute bits of rotten wood and some vascular plant tissue. 



SPHAERONISCUS GAIGEI, new species. 



Holotype. — Cat. No. 45908, Museum of Zoology, University of 

 Michigan. Paratype. — Cat. No. 47946, U.S.N.M. Collected in high- 

 est timber on San Lorenzo, Sierra Nevada de Santa Marta, Colombia, 

 7,800 feet elevation, under leaves in ground, July 23, 1913. Orig. 

 No. 161. 



Body oblong, convex, contoiu- rounded posteriorly; contractile 

 into a somewhat fiattened ball; length 4.4 mm., width 1.8 mm. Head 

 set in first thoracic segment; front sinuous, with a sUght concavity 



