325 



of the tergites a row of long, distinctly davate hairs, another row of more 

 scanty hairs is often seen before the hinder one: the hairs are placed 

 on small, white tubercles. The sternites are not granulated, somewhat 

 striped transversally , glossy, the last sternite entire, the rest divided 

 longitudinally, along the hinder margins a row of fine, pointed hairs. 



Palps about as long as the body or a little longer, according to the 

 condition of the animals. Coxa smooth and glossy, except the front 

 part, which is somewhat granulose, the rest of the palps are opaque 

 and strongly granulated, except the fingers and a small part of the 

 under side of the hand next to the fingers. The hairs of coxa pointed, 

 on the other articles the hairs are short and slightly davate , gradually 

 passing into more slender and dentate ones ; the hairs of the fingers 

 pointed with some longer ones intermixed. — Trochanter with a short 

 stalk, only little longer than wide, the inner side strongly convex, behind 

 and above strongly swelled. Femur with a short, but distinct stalk, a 

 little shorter than céphalothorax, slender, the inner side nearly straight, 

 sometimes even very slightly concave , behind a little widened from the 

 base, the outer side slightly convex, rounded next to the extremity. 

 Til)ia with a distinct stalk, on the inner side a little widened from the 

 stalk and then very slightly convex or nearly straight, the outer side 

 very slightly convex, somewhat rounded towards the extremity; in all 

 the tibia is rather clubshaped. Hand with a short stalk, from somewhat 

 oblique base evenly and slightly convex on both sides, gradually passing 

 into the fingers. These are considerably longer than the hand, distinctly 

 curved. 



Mandibles: galea of q^ very short, pointed, with no teeth, that of 

 Q much longer and more robust, straight, with some fine teeth in the 

 extremity. 



Legs (except coxa, trochanter and trochantin) minutely granulose, 

 with slightly davate and dentate hairs, the femora of the two posterior 

 pairs of legs broad. Claws simple. 



Length: 2,4 mm. 



Measurements: céphalothorax: long. 0,80; lai behind 0,69. Femur: 

 long. 0,69; lat. 0,16. Tibia: long. 0,61; lat. 0,19. Hand: long. 0,48; 

 lat. 0,27. Fingers: long. 0,60 mm. 



Argentina: St. Catalina 36 specimens, 16 (^'j 20 Q (Dr. Silvestri). 



The species is very much allied to Ch. rufus Balzan and Ch. Cane- 

 strinil Balzan ; these three species are however easily distinguished from 

 each other in the following manner : 



Ch. rufus : Coxa strongly granulated and opaque, as also the hand , 

 tibia somewhat oblique, being on the inner side most convex near the 

 base and on the outer side most so towards the extremity, femur 

 4—5 times as long as broad, hand considerably shorter than tibia, 

 fingers a little longer than the hand, about 1 : 1,1; the hairs of abdomen 

 very strong, but short. 



