— 9 



Head rich reddish brown; legs and latero-cervical 

 shield yellowish brown; mandibles concolorous with 

 the head but the distal half, the mesal edge and the 

 dorsal and lateral ridges jet black. Antennae conco- 

 lorous with the head ; membrane between ctypeus 

 and labrum, the tips of antennal joints and two 

 spots on distal joint of antenna, milky white.. Perit- 

 remes brown, stigmata white. Maxillary and labial 

 palpi concolorous with the head. Pubescence reddish. 



Thoracic spiracle caudad of ventral half of latero- 

 cervical shield; the abdominal at cephalic margin 

 of the segments. 



Stigmata roundly oval, convex, apparently clo- 

 sed ; the thoracic no larger than the others ; peritremes 

 open cephalad (but caudad on the thorax), larger on 

 the thorax and there oval, unarmed ; round else- 

 where. Two oval pale yellow spots just caudad of 

 thoracic segments 2 and 3 aj)parently represent 

 vestigial stigmata. Peritremes where open not sepa- 

 rated, the opening represented by a line. 



Form curved; the body cylindrical, the caudal 

 apex obtusely narrower. Ventral surface flattened, 

 dorsal convex, body transversely wrinkled or folded ; 

 legs prominent. Greatest length when extended, 

 58 mm ; greatest width, anal segment at base, 14.5 mm ; 

 length in natural position (taken through middle of 

 body, dorsum to dorsum) 25.0 mm. Greatest width 

 of head, 9.2 mm. Thickness, 11.0 mm. 



Head large, convex, alutaceous ; labrum sca- 

 brous, subhemispherical, inclined from a ridge at 

 proximal third. Clypeus included within the bases 

 of the mandibles, thus narrower than the epicranium, 

 rectangular (about three and a quarter times wider 

 than long), subscabrous, bearing six long bristles, 

 two unequal ones at each latero -cephalic angle and 

 two at cephalic margin, on each side of the meson. 



Epicranial sutures very faint but abruptly distinct 

 just caudad of their juncture on the vertex (just 

 caudad of apex of epicranial sclerite). Epicranial 

 sclerite obtriangular, latero-cephalad just excluding 

 the antennae. 



Antennae filiform, 4-jointed (not counting the 

 short conical bulla), no longer than the thorax, a 

 little shorter than the mandibles, inserted laterad of 

 the latter at their base ; joint 2 longest, then 3, 1 and 4, 

 the last over twice longer than wide; joint 3 with a 

 disto-lateral nipple-like prolongation (the appendix) 

 which is a third the length of the distal joint. Joints 

 1 and 2 with a few long setae, rest naked (1 seta on 

 joint 2, seven on joint 1, mesal aspect). Joint 2 

 four and a half times longer than wide. Distal joint 

 obliquely truncate. 



Mandibles long, distinctly longer than broad at 

 base (excluding retinaculum), curved, the apex 

 bidentate, the outer tooth broad, obliquely trun- 

 cate, acute distad, the inner small, obtuse; a dorso- 

 median ridge runs from this tooth to base laterad of 

 middle; base widens rapidly and mesad (somewhat 

 distad) bears a large, black crushing tooth (= retina- 

 culum). Plat ventrad and there with a few longitu- 

 dinal grooves which are short; convex and ridged 

 dorsad and with a dorso-lateral secondary ridge on 

 proximal half, obliqued from just laterad of base of 



the median ridge disto-laterad nearly to lateral 

 margin which it approaches at about half way to 

 apex. This ridge is reddish yellow. Mandibles smooth, 

 subscabrous on proximo-lateral half. Secondary ridge 

 forming a scrabe-like groove with the median ridge but 

 this does not appear from its position to. be a scrobe. 

 Retinaculum at base with an upright projection 

 which bears dense, short, reddish hairs like a brush 

 on its distal face; to one side of this is a tuft of 

 long reddish hairs (the penicellus). Ventro-lateral 

 mandibular articulation, ball and socket; dorsad a 

 transverse, short, curved row of stiff setae from 

 about middle of base of the retinaculum. 



Cardo of maxillae nou longer than wide, chitinized 

 dorsad, flat ventrad, the stipes compressed, over 

 twice longer than wide (dorsal aspect), its dorsal 

 edge armed with a row of minute teeth. Palpus 

 4-jointed, the proximal joint bulbous (the palpigerous 

 stipes), shortest, joint 3 next shortest, somewhat 

 longer than wide, joints 2 and 4 longest, 4 somewhat 

 longer, over twice the length of 3 which bears a 

 single seta laterad just before tip; 2 and 4 naked. 

 Lacinia and gaiëar closely adherent, apparently a 

 single stout piece with a longitudinal fold; both at 

 apex are armed with stout black setae and both are 

 compressed. Stipes glabrous, with slender reddish 

 setae distad (lateral aspect and along margins); 

 lacinia with the same proximad (mesal aspect), the 

 galea along lateral aspect. Galea attaining distal 

 palpal joint, the lacinia somewhat shorter, the for- 

 mer 1-jointed, both separate slightly at apex. 



Palpigerous stipes with about a half dozen 

 short setae laterad. Labium consisting essentially 

 of the mentum and palpi, the submentum and glossae 

 absent. Mentum fleshy, tongue-like, wider than 

 long and rather thickly clothed with large reddish 

 hairs; palpi 2-jointed, the first joint thicker and 

 shorter than the second, about one and a third times 

 longer than wide; joint 2 over turice longer than wide. 

 Palpi naked. 



Thorax subquadrate, somewhat wider than the 

 head; prothorax dorsad with one distinct transverse 

 incision, the meso-and metathorax each with two 

 and thus with three lobes. Latero-cervical shield 

 creased near and along its caudal margin, without 

 discal clothing but at the margins guarded by a 

 row of slender reddish setae (except that margin 

 nearest the spiracle. Cervix naked. 



Legs guarded by yellowish chitinized plates 

 laterad and cephalad, increasing in size caudad, the 

 hind femur being over twice the length of the cephalic 

 one. Coxae and trochanters obsolate; tibiae much 

 shorter (over twice) than their femora, the latter 

 obtusely prolonged over the knees ; tarsi two-jointed, 

 both joints longer than their tibiae, in the cephalic 

 legs the tarsus longer than femur; joint 1 of tarsus 

 longer than 2, both short, 1 tumid ventrad toward 

 apex, 2 cylindrical, 1 % times longer than wide, 

 without appendages but terminating in a single long 

 spine which is swollen at base. Legs clothed with 

 numerous long and short reddish setae, less numerous 

 on the femur. Abdomen cylindrical somewhat over 

 thrice the length of the thorax, 9-segmented, the 



