596 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



Male genitalia similar to Megamelus approxima, but genital styles 

 about half as long, scarcely divergent. 



Described from more than 150 specimens of both sexes, macrop- 

 terous and brachypterous, from Habana, Cuba (Baker). 



Type-specimen. — In collection of Pomona College. 



Paratype.—^o. 15970, U.S.N.M. 



DICRANOTROPIS MARGINATUS Van Duzee. 

 Plate 46, figs. P, Q. 

 Pissonotus marginatus Van Duzee '97:236; '0.^:198. — Osborn '97:235. 



Length of body, 2.6 mm.; width of vertex, 0.21; width of frons, 

 0.26; antennae I, 0.13, II, 0.37. General color dark, abdomen and 

 notum black, elytra (brachypterous) red with apical margin white, 

 vertex and frons red, clypeus black, pleura brown to black, sternum 

 yellowish, legs brown. 



Head narrower than jirothorax; vertex a little longer than broad, 

 weakly carinate; frons subrectangular, twice as long as broad, 

 slightly narrowed above; median carina forked a little below apex 

 of head; gense broad; antennae about as long as frons, I fully one- 

 third as long as II. Lateral carinas of pronotum extending to hind 

 margin. Legs rather stout; foretibije somewhat compressed; hind 

 tibiae longer than femora; calcar half as long as basal tarsus. 



Male genitalia somewhat obscured ; genital styles short, appressed 

 to pygofers; with a yellow ellipse near base of pygofers beneath. 



Redescribed from two males and two females (brachypterous) 

 from Greensburg, Pennsylvania (Wirtner). The male genital seg- 

 ment is somewhat different from that of the other species, being more 

 evenly rounded and the styles less conspicuous. 



DICRANOTROPIS DELICATUS V«n Duzee. 



Pissonotus delicatus Vav Duzee '97:237; '07:44; '0^:198. 

 Pissonotus basalts Van Duzee '97:238; '05:198. 



Length of body, 2.7 mm.; width of vertex, 0.23; width of frons, 

 0.26; antennae I, 0.20, II, 0.38. General color reddish brown to dark 

 reddish brown; brachypterous elytra margined apically with white 

 more or less completely; pronotum occasionally with a narrow white 

 margin posteriorly; frons narrowly margined with white at apex; 

 clypeus and forecoxae black; tarsi and basal antennal joint black; 

 legs reddish with black stripes. Body rather small. 



Head smaller, narrow, short, not strongly carmate; vertex short, 

 slightly longer than broad ; frontal carina forked a little below apex 

 of head, indistinct at apex; antennas about as long as frons, I half as 

 long as II. Lateral carinas of pronotum percurrent to hmd margin. 

 Elytra usually truncate, short, sometimes macropterous. Legs 

 rather short, hind tibias scarcely longer than femora, calcar a little 

 more than half as long as basal tarsus. 



