The Chonaphini 179 



Selenocheir sinuata, new species 



Figs. 53b-58 



Hybaphe tersa (nee Cook, 1904): Causey, 1954fl:222, fig. 1; 1955:91. 

 Chamberlin and Hoffman, 1958 (in part):36. Buckett, 1964:8-9. 



Type specimens — Male holotype and 3 male, 7 female, and 3 

 juvenile paratypes (UCD) collected by J. S. Buckett and M. R. Gardner, 

 20 December 1966, 2 mi (3.2 km) southwest of Dales, Tehama County, 

 California. One male and one female paratypes deposited at NCSM. 



Diagnosis — Acropodite directed generally anteriad from coxa, 

 distal curvature sharp, well defined, distal part variably sinusoid, blade- 

 like throughout length. 



Color in Life — Paranota variably red to orange, metaterga black 

 with concolorous red to orange bands along caudal margins or middorsal 

 semilunar blotches. 



Holotype — Length 27.6 mm, maximum width 9.5 mm, W/L ratio 

 34.4%, D/W ratio 33.7%. 



Epicranial suture strong, distinct, terminating in interantennal 

 region. Width across genal apices 2.7 mm, interantennal isthmus 1.2 

 mm. Antennae relatively long and broad, reaching back to midlength 

 of 4th tergite; relative lengths of antennomeres 2>3>6>4>5>1>7; 6th 

 antennomere with microsensilla on outer distal margin. Genae with 

 shallow central impressions. Facial setae as follows: epicranial 2-2, 

 interantennal, subantennal, and frontal not detected and presumed absent, 

 genal 1-1, clypeal about 8-8, labral about 12-12. 



Collum broad, ends terminating slightly below those of succeeding 

 tergite. Tergites smooth, polished. Paranota well developed throughout 

 body, broadest on anterior segments, becoming slightly narrower caudad, 

 moderately depressed, continuing slope of dorsum, anterior corners 

 with small but distinct denticle on segments 2-4, broadly rounded on 

 remaining segments, caudolateral corners angular on 2-3, blunt on 4- 

 5, rounded on remaining tergites, becoming progressively angled caudad 

 in caudal half of body. Peritremata moderately distinct, moderately 

 elevated above paranoial surfaces; ozopores located caudal to midlength, 

 opening sublaterad. 



Sides of metazonites granular, with distinct, irregularly serrate 

 to jagged ridges subtending coxae through segment 10, becoming 

 progressively indistinct thereafter. Gonapophyses moderately long, 

 apically rounded. Pregonopodal sterna glabrous; 5th sternum with two 

 low, paramedian knobs between 4th legs, much shorter than widths of 

 adjacent coxae, and lower, flattened elevated areas between 5th legs; 

 6th sternum strongly depressed between both leg pairs to accommodate 



