486 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



sloping seen in profile. The sternum is rather large, of a short ovate 

 form, truncate in front, but slightly convex, very densely and finely im- 

 presso-punctate, hairy. The eyes are somewhat large, the anterior cen- 

 tral ones a little smaller than the others ; the hind row is straight, the 

 front row slightly curved downward; the four central eyes form a 

 nearly perfect square, the area occupied by them being scarcely per- 

 ceptibly shorter than broad and scarcely broader behind than in front ; 

 the lateral eyes are contiguous, the interval between the posterior cen 

 tral eyes is nearly as large as their diameter and slightly larger than 

 the interval between the hind central and lateral eyes, which interval is 

 evidently smaller than the diameter of one of these eyes ; the anterior 

 central eyes, which are placed on a strong blunt protuberance, are sepa- 

 rated from each other by an interval as large as the diameter of these 

 eyes and little larger than that which separates them from the anterior 

 lateral eyes. The mandibles are perpendicular, nearly cylindrical, very 

 slightly con\-ex longitudinally, smooth and shining, and hairy, especially 

 at the apex and on the inner side; their length is more than double 

 their breadth, and nearly double as great as the height of the clypeus ; 

 the length of the claw is scarcely greater than the basal breadth of the 

 mandibles. Maxillce oblong, rounded at tip, and also slightly rounded 

 on the outer side, straight on the inner, and inclined toward the lahium, 

 which is rounded on the sides, narrowing toward the rounded extremity, 

 and about as long as wide at the base. The tibial joint of the palpi is 

 scarcely double as long as broad, but very slightly and gradually incras- 

 sated toward the apex ; the tarsal joint is a little narrower, and tapers 

 gradually toward the blunt apex ; it is about as long as the two pre- 

 ceding joints taken together. The legs, like the palpi, are shortish, and 

 covered with coarse hairs ; the first and fourth pair of legs are of equal 

 length ; the metatarsus of the fourth pair is scarcely longer than the 

 tibia. The abdomen is oblong, somewhat inversely ovate, and rather 

 broadly rounded at the extremities, not very high, shining, and some- 

 what hairy ; the belly shows a very distinct spiracle between the ma- 

 millse and the rima genitalis. The vulva consists of two large rounded 

 shallow fovese open on the inner side; the depression formed by these 

 two fovePB, which is open in front, and is limited posteriorly by a sin- 

 uated ridge, has nearly the form of a Greek to. 



Color. — GephalotJiorax rusty-red, the eye-area and mandibles in gen- 

 eral darker, brownish or blackish. Sternum, maxilkv, and labium reddish- 

 brown. Palpi blackish or piceous, with more or less distinct reddish 

 rings. Legs of a bright rusty-red color, the thighs of the fourth pair, 

 as also the tibise and tarsi (and sometimes even the metatarsi), black 

 at the apex, the anterior thighs black, red at the base. Abdomen black 

 or piceous, with white spots ; its anterior margin is surrounded by a 

 white, narrow band, broken in the middle, and not reaching the middle 

 of the sides ; along the middle of the back is a series of three or four 

 spots, gradually diminishing in size backward, the first of these spots 



