114 NEW YORK STATE MUSEUM 



coast near Monterey, California. The tlies, of which there were 

 nianj, were resting or running on the surface of the ocean water 

 of the tide pools, and had a tendency to gather in large numbers 

 in " patches " and '* in ball like masses " on the surface of the 

 water. None were seen below the surface, nor were any seen 

 tlying. They moved about on the surface of the water very 

 rapidly. The following is a description given by Professor Kel- 

 logg, of the species: 



Eretmoptera browni Kellogg 



Biol. Bui. 82. 1900 



Male (fig.21). Length 2 mm. Head slightly broader than the 

 thorax, eyes widely- separated, very small, very convex, hairy, 

 and with rather large facets; ocelli absent; antennae (fig.22) 

 short, length 3 mm.; six-segmented, the basal segments wide and 

 globose, the sixth segment longest, the second next, the third and 

 fifth about equal, the fourth shortest, with a few short strong 

 hairs on each segment; and the surface everywhere with a fine 

 stiff pubescence. The mouth parts are of simple N e m^ a t o - 

 c e r o u s type, short, and with distinct labrum-epipharynx, 

 maxillae, hypopharynx, and labium; mandibles absent; labrum- 

 epipharynx (fig.l9) short, broadly triangular, with obtusely 

 rounded tip. Maxillae with short, weak, tapering, pointed lobe, 

 and 4-segmented palpi, 3 mm. long; the palpi with the last two 

 segments longest and equal, and all the segments provided like 

 the antennae with a few short stray hairs and a fine stiff pubes- 

 cence (fig.l6) ; hypopharynx (fig.lS) elongate, triangular, as long 

 as the labrum-epipharynx, but narrower and more acute; labium 

 (fig.17) short, lip-like, with free paraglossae, without pseudo- 

 tracheae. The face is whitish Avith a median longitudinal dark 

 line, and the anteunary fossae with dark margins; the basal 

 segment of the antenna is rather dark, the other segments pale. 

 Thorax without bristles, dark nbove, ])ale beneath. Legs long 

 and slender, whitish Avith blackish joints; middle and hind legs 

 longest and equal, front legs only a little shorter; average meas- 

 urement of middle leg, femur 1 mm., tibia 1 mm., tarsus 1 mm.; 

 tarsus 5-segmented, segment one as long as segment two. three 

 and four together; segment five slightly longer that segment four; 

 tibiae of all legs with a single apical spur; tarsal claws strongly 

 cnrved, thickened at base, with three delicate sitines on basal half; 

 no pulvilli; empodium (fig.l.j emp.) rather long, curving, filiform, 

 and plumose or pectinate for its whole length. Wings narrow, 

 strap-like, extending only to fourth a.bdomiual segment, length 

 .75 mm., and wholly without veins; whitish, somewhat wrinkled. 



