106 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io4 



band in between. Anterior tibia with four narrow reddish bands, 

 three on basal two-thirds, the last one apical. Tarsi stramineous. 

 Median and hind femora with three conspicuous bands on apical two- 

 thirds, the outer two wide and brown and the median narrow, incom- 

 plete, and reddish. Midtibia and hind tibia mth four reddish bands; 

 the last narrower. Midtarsi and hind tarsi reddish. Thorax laterally 

 brownish ; prosternum and metasternum stramineous, mesosternum red- 

 dish. Abdomen ventrally light brown and mth many irregular dark 

 brown and blackish spots laterally on first five segments; last two 

 segments brown. Comiexivium dorsally and ventrall}^ with anterior 

 halves dark brown and posterior halves reddish brown. 



Head as in figure 79,a,b. Finely granulated, with inconspicuous 

 pilosity; slightly shorter than thorax and less than twice the width 

 of the head across the eyes. Width of eyes dorsally less than half inter- 

 ocular space. Deep interocular depression. Ocelli closer to eyes than 

 to each other. Spines behind antenniferous tubercles relatively short, 

 from above equal to width of eye. No tubercle present behind ocelli. 

 Antenna inconspicuously pilose; length of segments 73:50:52:- — ; 

 first segment thicker than second and thhd. Rostrum relatively 

 thick; segments 32:20:14. Pronotum finely granulated; carinae 

 granulated and more conspicuous on anterior lobe and extending to 

 anterior part of posterior lobe. CoUar with lateral angles not promi- 

 nent, rounded. Spines on humeral angles broad, shorter than spines 

 on bases of antenna, granulated. Posterior margin of pronotum 

 slightly concave; sublateral angles roundly angulate. Scutellum 

 carinate, ending in a horizontal process. Fore femur covered dorsally 

 with coarse tubercles, irregularly distributed; ventrally smooth, with 

 but a few very small tubercles; anterior margin with many setigerous 

 spines in an even row. Hind femur and midfemur slightly incrassate 

 at apex, with a few, scattered, very small tubercles. Upper margins of 

 abdomen straight, margin of connexivium without elevations. Geni- 

 talia from the side as in figure 79,c. Posterior margin of seventh 

 sternite convex near middle. Posterior lobe of eighth tergite not 

 prominent. 



This species is closer to Diarthrotarsus malaisei Wygodzinsky and 

 annulosus (Stkl) than to the other two known species of the genus. 

 It can be separated from the first by the coloration, the shape of the 

 posterior lobes of the eighth tergite, and the shape of the posterior 

 margin of the pronotum. It can be separated from annulosus by the 

 coloration, the absence of tubercles behind the oceUi, the smoother 

 femora, and the shape of the genitalia. 



Holotype: Female, USNM 61730, collected on the northern slopes 

 of Mount Marahuaca, Territorio Amazonas, Venezuela, May 1-25, 

 1950. 



