NO. 3558 MALLOPHAGA—ELBEL 57 
TaBLe 5.—Measurements in mm. and computations for Bucerophagus productus 
males on host 2, Bucorvus leadbeateri (see p. 45 for explanation of formulae) 
Head Width Total 
Length Width | Prothorax Metathorax Abdomen | Jength 
N=28 0. 414 0. 521 0. 443 0. 521 0. 7285 1.750 
414 - 621 - 443 . 521 . 7285 1.700 
.414 . 621 443 . 621 . 7285 1.743 
.414 - 5285 443 471 - 7285 1. 743 
. 414 - 5285 443 . 5285 . 7285 1.714 
-414 - 5285 443 . 5285 . 686 1.850 
.414 - 5285 443 - 5285 . 707 1. 929 
.414 ~ 5285 457 - 5285 . 707 2. 029 
414 - 5285 .457 - 6285 . 707 1.700 
414 - 5285 . 457 - 557 . 764 1.807 
- 400 - 5285 . 457 . 557 . 764 1.821 
- 400 . 536 457 - 557 .714 1.979 
- 400 . 536 . 457 . 557 .714 2. 136 
. 386 - 536 . 457 . 557 . 736 2.129 
. 386 - 536 - 457 7557 - 743 2. 271 
. 8785 . 636 - 457 614 eel 2.171 
. 393 . 614 421 . 543 . 757 1. 857 
- 407 . 514 - 450 - 543 hol, 1. 857 
4285 - 550 - 450 - 643 . 786 2. 243 
- 4285 550 . 450 - 543 . 786 1. 579 
- 4285 . 550 436 . 564 - 800 2. 021 
- 4285 . 543 - 436 . 564 - 750 1. 964 
443 - 543 471 . 5386 . 750 2.079 
- 443 . 543 -471 . 536 . 750 1.900 
421 - 543 471 . 536 . 750 1. 900 
. 457 . 557 . 464 - 500 814 1.814 
. 371 - 500 . 464 . 550 - 821 1.786 
- 3285 - 500 .414 . 571 . 700 1.914 
Sx2= 11. 468 14. 878 12. 612 15. 0615 20. 8765 53. 386 
X= 0.4095 0. 531 0. 450 0. 588 0. 746 1. 907 
Sx2= 4.714 7.911 5. 686 8.114 15. 597 102. 629 
(Sx2)2= 131. 515 221. 355 159. 063 226. 849 435. 828 2850. 065 
(Sx2)2/N= 4. 697 7. 906 5. 681 8. 102 15. 665 101. 788 
S(x—x2)2= 0. 0170 0. 0050 0. 0050 0. 0120 0. 0320 0. 841 
f= . 00060 . 000180 . 000180 . 000444 . 001185 . 0311 
TABLE 6.—Measurements in mm. and computations for Bucerophagus productus 
females on host 1, Bucorvus abyssinicus (see p. 45 for explanation of formulae) 
Head Width Total 
Length Width Prothorax Metathorax Abdomen length 
N=8 0. 464 0. 636 0. 536 0.714 1. 086 3. 250 
443 . 614 - 5285 714 1. 050 3.171 
. 507 . 650 . 543 . 686 1. 043 2. 607 
443 . 657 - 543 . 686 1. 136 2. 736 
- 4785 . 657 . 543 . 6785 1.143 3.100 
. 493 . 657 - 543 . 6785 1.193 3.114 
. 500 . 671 - 543 . 6785 1.100 2. 621 
. 457 . 614 . 543 . 693 1. 0785 3.171 
sxi= 3. 7855 5. 156 4. 3225 5. 5285 8.7795 23.770 
x= 0.473 0. 6445 0. 540 0. 691 1. 097 2.971 
Sx?= 1. 796 3. 326 2. 336 3. 822 9. 657 71.132 
(Sx1)2= 14. 330 26. 584 18. 684 30. 564 77. 080 565. 013 
(Sx1)?/N= 1.791 3. 323 2. 3355 3. 820 9. 635 70. 627 
S(x—x1)2= 0. 0050 0. 0030 0. 00050 0. 0020 0. 0220 0. 505 
si= - 000714 - 000428 . 0000714 - 000286 - 00714 0721 
