NORTH AMERICAN SPECIES OF THE GENUS ATAX 259 



PLATE XXX. 



Fig. 19. A. serratus. Outer side, right palpus of female, x 170. 



Fig. 20. A. serratus. Inner side, part of left palpus, x 170. 



Fig. 21. A. serratus. Distal segment, right leg IV of female, x 185j 



Fig. 22. A. serratus. Claw of right leg II. x 540. 



Fig. 23. A. serratus. One half of genital area of female, x 170. 



Fig. 24. A. fossulatus. Outer side left palpus of male, x 180. 



Fig. 25. A. fossulatus. Distal segment of first pair of legs. Female. 

 x250. 



Fig. 26. A. fossulatus. Genital area of male, x 180. 



Fig. 27. A. stricta. Distal segment of first pair of legs. Male, x 250. 



Fig. 28. A. stricta. Genital area of male, x 250. 



PLATE XXXI. 



Fig. 29. A. arcuata. Outer side, right palpus of female, x 250. 



Fig. 30. A. arcuata. Distal segment, last pair of legs, anterior 

 surface. Female, x 190. 



Fig. 31. A. ypsilophorus. Outer side, right palpus of female, x 180. 



Fig. 32. A. ypsilophorus. Posterior surface, distal segment, right 

 leg IV. Female, x 180. 



Fg. 33. A. ypsilophorus. Posterior end of body of female from ven- 

 tral aspect, x 180. 



Fig. 34. A. tumidus. Outer side, left palpus of female, x 250. 



Fig. 35. A. tumidus. Anterior surface of distal segment, leg IV. 

 Female, x 190. 



PLATE XXXII. 



Fig. 36. A. tumidus. Mandible, x 180. 



Fig. 37. A. tumidus. Outline of the epimera and maxillary shield 

 of female, x 55. 



Genital area of female, x 180. 



. Inner side, palpus of male, x 180. 



Segment 6, first leg, anterior surface. 



. Mandible, x 180. 



Outline of epimera and genital plate of one 

 side. Female, x 55. The line represents the median line of the body. 

 Fig. 43. A. (N.) ingens. Genital area of male, penis exserted. x 76. 



Fig. 38. 



A. 



tumidus. 



Fig. 39. 



A. 



(N.) ingens. 



Eig. 40. 



A. 



{N.) ingens, 



Male, x 250 







Fig. 41. 



A. 



(N.) ingens. 



Fig. 42. 



A. 



[N.) ingens. 



