NO. 3658 MALLOPHAGA—ELBEL 59 
TABLE 8.—Measurements in mm. and computations for Bucerophagus africanus 
males on host 1, Bucorvus abyssinicus (see p. 47 for explanation of formulae) 
Head Width 
Total 
Length Width Prothorax Metathorax Abdomen length 
N=3 0. 457 0. 628 0. 528 0. 693 0. 957 2. 528 
471 . 593 . 507 . 678 1. 057 2. 500 
- 493 . 586 - 500 . 728 1. 050 2. 557 
Sx1= 1.421 1.807 1. 585 2. 099 3. 064 7.585 
x 0. 474 0. 602 0. 512 0.700 1.021 2. 528 
Sx? = 0. 674 1. 089 0.786 1.470 3. 136 19.179 
(Sx1)?2= 2.019 3. 265 2. 356 4.406 9. 388 57. 5382 
(Sx1)?/N= 0. 673 1. 088 0.785 1. 468 3. 129 19.177 
S(x—x1)2= 0. 0010 0. 0010 0. 0010 0. 0020 0. 0070 0. 0020 
s} = 0. 00050 0. 00050 0. 00050 0. 0010 0. 00350 0. 0010 
TABLE 9.—Measurements in mm. and computations for Bucerophagus africanus 
males on host 2, Bucorvus leadbeateri (see p. 47 for explanation of formulae) 
Head Width 
Total 
Length Width Prothorax Metathorax Abdomen length 
N=6 0. 393 0. 557 0. 500 0. 650 0. 943 2. 371 
. 400 . 557 - 500 . 650 1. 028 2.478 
- 400 . 586 - 500 . 650 0. 971 2.428 
- 443 . 571 485 - 686 1. 043 2. 443 
. 457 - 586 .514 . 686 1. 050 2. 486 
. 371 . 564 . 621 . 671 1. 064 2. 386 
Sxo= 2. 464 3.421 3. 020 3. 993 6. 099 14. 592 
X= 0.411 0. 570 0. 503 0. 666 1. 016 2.432 
Sx?= 1. 017 1. 951 1. 621 2. 659 6. 211 35. 499 
(Sx2)2= 6. 071 11. 703 9. 120 15. 944 37. 198 212. 926 
(Sx2)2/N = 1. 0120 1. 950 1. 520 2. 657 6. 200 35. 488 
S(x—xX2)?= 0. 0050 0. 0010 0. 0010 0. 0020 0. 0110 0. 0110 
s3= 0. 0010 0. 00020 0. 00020 0. 00040 0. 00220 0. 00220 
TaBLE 10.—Measurements in mm. and computations for Bucerophagus africanus 
females on host 1, Bucorvus abyssinicus (see p. 47 for explanation of formulae) 
Head Width 
Total 
Length Width Prothorax Metathorax Abdomen length 
N=4 0. 493 0. 664 0. 564 0.728 1. 214 3. 300 
. 514 . 628 . 543 . 693 1. 236 3. 271 
. 443 . 628 . 543 . 786 1.300 3. 428 
- 486 . 643 . 586 . 714 1.110 2.700 
Sxi= 1. 936 2. 563 2. 236 2.921 4. 860 12. 699 
xr 0. 484 0. 641 0. 559 0.730 1, 215 3.175 
Sx7= 0. 940 1. 643 1, 251 2.138 5. 924 40. 631 
(Sx1)2= 3. 748 6. 569 5. 000 8. 532 23. 620 161. 265 
(Sx1)2/N= 0. 937 1. 642 1. 250 2. 133 5. 905 40. 316 
S(x—x1)?= 0. 0030 0. 0010 0. 0010 0. 0050 0. 0190 0.315 
si= 0.0010 0.000333 | —_ 0. 000333 0. 00166 0. 00633 0. 104 
