84 Kecorps of the S.A. Museum 



labial jjalpi small, -^U|)i)r)rte<l liy a narrow proiluccd portiun of nn-ntum. Antennae 

 rather long, most of the joints nioniliforni. Prdtluira.v rather eloni^ate, \ery 

 narrow in front, truncate at hase. Sinttcllniii \erv small, lilxtra small, depressed, 

 sides finely serrated. Ahduincn with live strongh' margined segments on iipi)er 

 surface, a sixth feeljly margined, and a small immarginate se\enlh. Lcijs rather 

 long: front tibiae near middle with a strong notch, at edge of and behind the 

 notch with three combs: tarsi thin, fourth joint lightly produced under base of 

 fifth. Apterous. 



The genus should be placed next to Domcuc in catalogues: at first glance 

 the remarkable insect named below appears like an exaggeration of D. torrrnseii- 

 sis. but the complete absence of eyes is at once distinctive. 'I'bere is a shining 

 rounded knob close to tlie base of each antenna, that at first glance appears like 

 a non-faceted eye, and a similar knob is near each antenna of D. torrciisciisis, 

 but on that species there is a coarsely faceted eye on the side behind each 

 antenna : on T. caeciis a feeble oblique ridge is placed behind each knob, and on 

 the left side of the type, at the end of the ridge, there is a feelile elevation ( with 

 a few punctures) that from some directions looks like a \er}- small eye, but on 

 the right side this appearance is wanting, and I have satisfied myself, after 

 repeated examinations from many angles, that eyes are really absent. There 

 are three combs on each side of the front tibiae, Ijut to see these clearlv a com- 

 pound power is reiiuired : one margins the edge of the notch, the others being 

 almost parallel with it : the teeth consist of closely placed setae, and in certain 

 lights have a golden appearance; under a hand lens they are hardly more than 

 indicated ; apparently somewhat similar combs are present on the front tibiae 

 of D. torreiiscnsis. The mandibles are clenched on the type, but so far as they 

 are visible they appear to be nondeutate. 



TRIPECTENOPUS CAECUS sp. nov. 



Plate ix, fig. I. 



Flavous; antennae somewhat darl<er : mandibles still darker. Clothed with 

 fine and rather sparse pubescence, a few hairs scattered about, becoming rather 

 numerous on UKjutli parts, and dense on apex of abdomen. 



Head slightly longer than wide, sides and liase strongly rounded, with a 

 short and narrow neck, scarcely thicker than ba.->al joint of antennae, with a 

 romid. highly-polished elevation near base of each antenna, on each side in 

 front a small projection overhanging the clypeus ; with sharply-defined but rather 

 small, irregularly-distrilnUed punctures. C'lyi)eus very short. I.abrum moder- 

 ately long and l)ilobe(l in front, .\nlennae extending almost to l.iase of pro- 

 thorax, first joint cylindrical slighth' shorter than second and third conil.)ined. 



