352 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Sr. 
Family PSAMMOCHARIDE 
6. Aporinellus galapagensis Rohwer 
This species has been recently described by Rohwer (Zoo- 
logica, Vol. V, No. 16, p. 174-175) from a single male col- 
lected on South Seymour, Galapagos, April 23, 1923, by the 
Williams Galapagos Expedition. Dr. William Beebe, chief of 
that Expedition, mentions in his book “Galapagos, Worlds 
End”, page 337, a small black wasp that he saw on Tower 
Island, but that he could not catch, dragging off a spider. 
This may have been the female of this species. In January, 
1906, at Wreck Bay, Catham Island, I captured a single speci- 
men of an Aporinellus, probably galapagensis. The spider it 
was dragging away is preserved but the wasp itself unfor- 
tunately was destroyed in being shipped from New York. The 
following is the description I made of it: 
Female. Length 7.5 mm. Fairly thickset. Black, marked 
with pale gray sericeous as follows: most of face, back of 
head, anterior, posterior and lateral parts of pronotum, the 
posterior quite narrowly; spot each side of scutellum, the 
postscutellum except the middle; propodeum except most of 
the disc and posterior face and lower sides; the thoracic pleurz, 
coxe and largely the rest of the legs; abdomen with a large 
subtriangular median spot near middle length and posterior 
borders of two and three, and probably also of four and five 
(these being greasy). Mandibles red mesad. Some long hairs 
at base of head, near neck. Clypeus gently emarginate mesad ; 
interocular space at vertex rather narrow, about equal to the 
antennal joints two and three, or a little less; joint three longer 
than four; inner spine of hind tibiz nearly two-thirds the 
length of the basitarsus. Primaries with two submarginal cells, 
dark colored at apical fourth. 
This species seems closely related to Aporinellus intermedius 
Banks of Southern California, but differs from it, at least in 
the distribution of the sericeous markings on the abdomen. 
Nearly all the Psammocharidz prey on spiders, from small 
ones to the giants of the American tropics. Many of the wasps 
