460 PROCEEDINGS OF THE NATIONAL MDSEUAf. vol.59. 



AMPHIPODA. 



HYALELLA INERMIS S. I. Smith. 



Specimens of both sexes were collected from the lake in the rushes 

 near Maracay, July 25, 1918. The males have 14 segments in the 

 liagellum of the seond antenna. 



ISOPODA. 



METOPONORTHUS PRUINOSUS Brandt. 



Three specimens (University of Michigan, Museum of Zoology, Cat. 

 Xo. 52003) were collected under some logs at the paper mill near 

 Maracay, July 20, 1918. 



LEPTOTRICHUS PITTIERI, new species. 



Type. —University of Michigan, Museum of Zoology, Cat. No. 52002. 

 On shore of Lake Valencia,, by paper mill at Maracay, Venezuela, 

 July 23, 1918, under log. 



Surface of body covered with peculiar processes; epimera and 

 appendages with many small spines. Head with prominent lateral 



FlG. 1. — LEPTOTRICHU3 PITTIERI, NEW SPECIES. A, SECOND ANTENNA; H, BEAD; T, TELSON; U, UBOPOD; 

 X, TIP OF TELSON ENLARGED, SHOWING ORNAMENTATION CHARACTERISTIC OF ENTIRE BODY. 



lobes, which are rather angular anteriorly; frontal margin making 

 an obtuse angle. Eyes very small. Second antenna with fourth 

 segment of peduncle longest; second segment of flagellum nearly 

 thrice the length of first. Thoracic segments with lateral parts 

 broadly expanded; the first a little longer than the others, which 

 are subequal in length. First two abdominal segments with lateral 

 parts undeveloped. The third, fourth, and fifth are broadly expanded 

 laterally and form a continuous line with the margin of the thoracic 

 segments. Posterior segment with postero-lateral margins very 

 slightly concave, rounded at apex; extending half its length beyond 

 the preceding segment. Basal segment of uropod half the length of 

 the exopod, which is slender and conical; endopod linear and two- 

 thirds as long as exopod. 



