Vou. II, Part IT] WILLIAMS—BEES AND WASPS 353 
dig their own burrows, others utilize those of their victims; a 
third class are mud daubers and are addicted, one might say, 
to cutting off their victims’ legs, wholly or in part. 
Family EUMENIDE 
7. Odynerus (Pachodynerus) galapagensis Williams, n. sp. 
Very like Pachodynerus nasidens (Latr.) in form, pattern 
and sculpture. 
Female. Holotype. Total length 9 mm. Black, with yellow 
markings as follows: spot on each clypeal tooth, base of man- 
dibles, between antennz and eyes, above base of antennz, 
anterior and posterior margins of pronotum, small spot on 
pronotal lobe, the knees and a stripe along anterior side of 
tibize, transverse band on postscutellum, lateral crests, superior 
valves (near pedicel) of propodeum, abdominal segments two 
to six with apical band, that of five sinuate. Antennz reddish 
brown beneath; tegulz testaceous, forewings ferruginous, 
ereyish black apically; hindwings more hyaline, pale ferru- 
ginous about costa. Segment one of abdomen with some pale 
brownish testaceous laterally. Clypeus rather shallowly emar- 
ignate striato-punctate except the sides. Most of the head and 
thorax with deep separate punctures; thorax reticulate-punc- 
tate laterally and nearly smooth where the legs fold back 
against its sides; postscutellum with a delicate, serrulate trans- 
verse ridge; posterior face of propodeum concave, shining, 
with a low, smooth median carina, somewhat fusiform and 
with oblique imperfect striz therefrom; lateral crests at first 
subhorizontal, becoming at length vertical and terminating out- 
wardly at inferior end nearly at right angles, as a free and 
conspicuous subspatulate scale; valves large, the upper auri- 
form. Abdomen above weakly punctate, except at apex of 
segments, segment six finely reticulate; beneath with the ab- 
dominal puncturation coarser and more scattered. Clothed 
with pale silky golden hair, mostly appressed and finer and 
less conspicuous on abdomen. 
