258 robert h. wolcott: 



Stoll, Otto. 



87. Hydrachnidae. Godman and Salvia's Biologia Centrali-Ameri- 

 cana; Zool. Part lix, 1887, 9-15. Pis. vii-ix. 

 Desc. A. alticola, A. dentipalpis and A. septem-maculatus. 

 van Vleet, A. H. 



96. Ueber die Athniungsweise der Hydrachniden. Zool. Anz., xix, 

 1896, 505-507. 

 Walckenaer [Chas. A. de] and Gervais [Paul]. 



44. Histoire Naturelle des Insectes. Apteres. Tom. iii; Paris; 1884. 

 Neglecting all the advances made since the time of Duges (34), 

 enumerates under Atax 16 species belonging to several genera, 

 among them A. crassipes Mull., A. grossipes Mull., A. spinipes 

 Mull. (Cochleophorus), A. vernalis Mull. (Cochleophorus), A. fur- 

 cula Koch and A. freniger Koch (= C. spinipes (Mull.) 

 Wolcott, R. H. 



98. New American Species of the Genus Atax (Fab.) Bruz. Zool. 

 Bull., i, 1898, 279-285. 



EXPLANATION OF PLATES. 



PLATE XXVIII. 



Fig. 1. A. crassipes. Outer side, right palpus. Male, x 180. 



Fig. 2. A. crassipes. Three basal segments of leg I. x 180. 



Fig. 3. A. crassipes. Genital area of female, x 250. 



Fig. 4. A. aculeatus. Outer side, right palpus. Female, x 180. 



Fig. 5. A. aculeatus. Posterior end of the body of a female, from 

 the unmounted specimen. No attempt has been made to mark the loca- 

 tion of hairs, but proportions and relative positions of parts shown are 

 correct, x 180. 



Fig. 6. A. aculeatus. Spine at the side of the genital opening of 

 female, x 595. 



Fig. 7. A. pectinatus. Outer side, left palpus of female, x 175. 



Fig. 8. A. pectinatus. Distal segment, leg I. Male, x 340. 



Fig. 9. A. pectinatus. Mandible, x 175. 



Fig. 10. A. pectinatus. Half of genital area of female, x 175. 



PLATE XXIX. 



Fig. 11. A. intermedius. Outer side, left palpus of female, x 250. 



Fig. 12. A. intermedius. Distal joint, hind leg of female, x 180. 



Fig. 13. A. abnormipes. Outer side, left palpus of female, x 260. 



Fig. 14. A. abnormipes. Anterior surface, right leg IV of male. xl75. 



Fig. 15. A. abnormipes. Claw of right leg II of male, x 540. 



Fig. 16. A. indistinctus. Outer side, right palpus of female, x 250. 



Fig. 17. A. indistinctus. Ventral surface, leg IV of male — segments 



4, 5 and 6. x 180. 



Fig. 18. A. serratus. Mandible of female, x 185. 



