Genera of the Familij Attidce. 313 



Sternum elongated, rather narrow. Anterior thighs separated by the 

 width of the lip; all the thighs longer than wide, fiose of the first 

 pair thicker and sometimes longer than the others, which are almost 

 equal. 



Legs usasiUj {$ ) 1, 3-4, 2; (p) 3-4, 1, 2; the first and second pairs more 

 robust, with femoral joints compressed. Tibia and patella of the 

 first a little shorter than the cephalothorax, these two articulations 

 equal, or the tibia a little the longer; tarsus and metatarsus shorter, 

 more slender, almost of the same length. Femora of the third and 

 fourth equal; tibia and patella of the third a little longer 

 than tibia and patella of the fourth ©r often of the same, 

 length. Tarsus and metatartus of the fourth of the same length as 

 the tibia and patella. Tibia of the fourth parallel, or slightly en- 

 larged at the extremity. Femoral, tibial, and metatarsal spines on 

 the four pairs; metatarsus of the fourth with spines throughout its 

 length. 



Falces as long or longer than the face, vertical, often deep set' in both 

 sexes, never ridged. 



Palpus ($} robust and short (except H. Adausoui); tibia shorter than 

 patella and provided with external apophyses; tarsus longer than 

 the preceding articulations and wide (except H. Adausoni); bulb 

 simple, reaching almost the extremity of the tarsus; hook rarely 

 apparent. 

 The species described by Messrs. Koch and Keyserling under this genus 



have the following variations in the leg formula: female, 1, 2, 3, 4; 1, 3, 3, 4j 

 1, 4, 3, 2; 1, 3, 4, 2; 1, 273, 4; 4, 3, 1, 2; 473^1, 2; male, 1, 2, STT; 1, 3, 2, 4; 1, 3, 

 4, 2; 1, 4, 3, 2; 1, iTB, 2; i~i, 3. 2; 4. 3, 1, 2; ITs, 1, 2; 3, 4, 1, 2; 4, 1, 3, 2. In 

 the same species the clypeus varies in height from i to i the large middle 

 eyes. It is interesting to note that whil-:> in the species described by Key- 

 serling there s- ems to be a very constant relation b-tweea the length of 

 the whole body and the lonsrest pair of legs, the length of the longest legs 

 being only very little greater or less than the total length, H. chrysostomus, 

 male, has its total Ir-ngth 7 mm., and its Imgest leg 11.6 mm, H. vittatus, 

 male, a fa'r representative of the other species, has its total length 4.2 mm., 

 and its longest leg 3.8 mm. The gi-eatt^r proportional length of the long- 

 est legs ia H. chrysostomus is correlated with other structural modifica- 

 tions which seem to separate it from the other species of this genus. The 

 same remarks are applicable also to H. lautus. 



1 The French word is " renfonc6e." 



