PROC. ENT. SOC. WASH., VOL. 24, NO. 6, JUNE, 1922 147 



portion above the coxa with a similar tuft of hairs; pteropleura with a cluster 

 of smaller hairs on its lower part, directly below the calypters; the latter brown 

 with blackish cilia. Abdomen of the same color as the thorax, somewhat 

 flattened rather than compressed. Hypopygium black, the lamellae brown 

 with black hair, rather spatulate in form, longer than one segment of the 

 abdomen. 



Front coxae green with rather thick whitish dust, on their front side with 

 numerous erect rather long hairs; front femora of the same color, on the inner 

 side near the base with a slight protuberance bearing a close bunch of 6 or 8 

 bristles; on the under side of the femur, near the base, are scattered, erect hairs, 

 which become bristle-like about the middle where they form a cluster not very 

 dense; front tibia dark brown, on its flexor side slightly curved and bearing an 

 irregular row of erect, small black spines, which begin at the second third of its 

 length; the apex of the tibia does not have any conspicuous spines. 



Front tarsi black from the base, the last tour joints almost equally long; the 

 first joint as long as the following three, slightly swollen on the under side, and 

 bearing a few spines below. Middle and hind femora slender, subshining, 

 ereen, the middle one with a row of erect bristles on the upper front side, begin- 

 ning about the middle, and some rather long hairs below, not arranged in rows. 

 Middle and hind tibiae and tarsi black. 



Wing elongated, narrow, uniformly brown in color, the third and fourth veins 

 parallel and rather far apart, ending in the apex; hind cross-vein at right angles 

 to costa. 



Female. Head structure precisely as in the male except that the face is a 

 little wider. Front legs of plain structure. Wing as in the male. 



Length of male 4.6 mm.; of female 5.2 to 6.2 mm. 



Described from 29 specimens of both sexes, collected by A. 

 L. Melander on the beach of the Pacific Ocean at Ilwaco, 

 Washington, in July, 1917. 



Type Male No.' 25240 U. S. Nat. Mus. 



In 24 specimens out of 29 the proboscis is retracted so that 

 the mandible-like organs are concealed by the inner lobes of the 

 lobelia: in the remaining five these organs are plainly visible as 

 in the accompanying figure. 



Melanderia curvipes Van Duzee. 



Hvdrophorus curvipes Van Duzee, Entomological News, Vol. 29, p. 49, 191 8_ 



A paratype female is in the National Collection from San 

 Diego, California, collected by Mr. Van Duzee; there are also 

 one male and three females collected by the writer at Santa 

 Barbara, California, July '>, 1 ( >17; one of the latter has the mouth 

 let down sufficiently to show the anterior tips of the side pieces, 

 but instead of being pointed, as in the other species, they are 

 rounded; they are hi .\\cver shining black for a little distance 

 and sharp enough so that they doubtless serve for grasping 

 and holding animals of some size. This species has in front of 

 the posterior spiracle a row of three or four well developed 



