620 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 4G. 



Head relatively rather large, fully as broad as prothorax, weakly 

 carinate at apex; frons broad, oval, usually about two-thirds as 

 broad as long (may be more or less than that), sometimes pale at 

 base; antennae reaching at least to clypeus, I scarcely half as long as 

 II. Dorsum moderately broad, short, with a slight foveal impression 

 between median and lateral carinae of pronotum and scutellum; 

 former only shghtly concave behind. Legs typical; hind tibiae only 

 slightly longer than femora, large at tip; calcar small, margin indis- 

 tinctly dentate. Elytra (brachj^terous) black, usually glossy, not 

 attaining to tip of abdomen; macropterous elytra brown to black, 

 moderately long. Abdomen carinate along median dorsal hne. 



Male pygofers notched deeply and broadly above; ventral notch 

 rather deep, narrower; aperture subcircular, margin pubescent; 

 styles rather long, lanceolate, acute at tip, pubescent apically; anal 

 tube obscurely bi-dentate ventraUy. 



Kedescribed from 24 males and females from California, Nevada, 

 Colorado, and Mexico (Acapulco), collection C. F. Baker. In the 

 aspect of the frons this species bears some resemblance to M. consimilis. 



MEGAMELUS ANALIS, new species. 

 Plate 49, fig. Ha.' 



Length of body 1.9 mm.; width of vertex 0.21; width of frons 

 0.23; antennae, I, 0.07, II, 0.20. General color orange yellow, abdo- 

 men brown to dark brown, or often light brown in female; legs and 

 antennae yellowish. 



Head rather weakly carinate; vertex moderately broad, about 

 square, scarcely produced in front before eyes; roimded in front; 

 frons more than half as broad as long, broadest a little above ocelli. 

 Antennae reaching a little beyond margux of clypeus, II about three 

 times as long as I. Thorax rather broa'd; lateral carinae of pronotum 

 flexed out behind eyes; legs short, rather stout; calcar very small. 

 Elytra typical. 



Male pygofers relatively large, aperture large; margin of aperture 

 sinuate, with an acute prolongation over base of styles; dorsal notch 

 slight; anal tube large, with one ventral process; styles short, cul- 

 trate, inner margin slightly sinuate, apex roundly acute. 



Described from three brachypterous males and many brachyp- 

 terous and macropterous females from Polk County, Wisconsin 

 (Baker). 



Type-specimen. — In collection of Pomona College. 



MEGAMELUS NIGRIDORSUM, new species. 



Plate 48, figs. A, I. 



Length of body 2.7 mm.; width of vertex 0.19; width of frons 

 0.21; antennae, I, 0.09, II, 0.21. General color black, usually glossy; 



1 See footnote beneath explanation of plate in Explanation of Plates, on page 637. 



