﻿THE CATTLE GEUBS OR OX WARBLES 



49 



Table 3. — Nuniier, size, and direction of travel of larvce of Jffypoderma lineatum 

 in each of 10 divisions of gullets of cattle examined during each month at 

 Dallas, Tex. 





J3 



i 



ft 



< 



.^ 



S 



3 



1-5 



1 



3 

 < 



Ut 



ft 



o 

 o 

 O 



a 

 > 



o 



a 

 s 



p 



ca 

 3 

 CI 



13 



Eh 



Number of larvae headed toward pharynx and 

 paunch in each of 10 divisions of the gullet 

 from pharynx to paunch: 

 First— 



Pharvns- ._.... _. ._. . _ 





 







^ 1 

 1 







2 

 





 







1 

 1 







1 



3 



3 



1 



2 

 2 



2 

 3 



6 

 2 



1 

 2 



1 

 2 



2 

 



8 

 4 



4 

 9 



16 

 21 



8 

 12 



2 



4 



1 

 





 1 





 







1 



2 

 



5 

 3 



9 



5 



7 



7 



10 



8 



6 

 3 



1 

 1 



1 









 2 







1 







5 



3 

 3 



1 

 4 



6 

 3 



4 

 2 



2 

 2 



10 



4 



6 

 5 



8 

 13 



17 

 4 



15 

 8 



15 

 16 



24 



14 



33 

 31 



26 

 32 



26 

 17 



10 

 6 



16 

 13 



26 

 21 



35 

 22 



29 



25 



36 

 31 



42 

 49 



60 

 49 



70 

 65 



43 



48 



14 

 16 



18 

 15 



14 

 27 



23 

 30 



30 

 35 



41 

 41 



39 

 34 



32 

 50 



41 

 52 



43 

 37 



5 

 4 



11 



7 



13 



14 



14 

 12 



21 

 16 



19 

 20 



22 

 10 



21 

 12 



17 

 20 



9 

 11 



4 

 4 



10 

 6 



8 

 16 



22 

 16 



30 



25 



22 

 16 



25 

 21 



22 

 24 



22 

 31 



18 

 16 







1 







1 





 2 



1 

 4 



1 

 3 



2 



7 



4 

 5 



2 



6 



1 

 3 



3 



1 





 





 





 





 





 





 







1 





 





 





 



47 



Paunch _ 



39 



Second — 



Pharvnx. _ . . . 



67 



Paunch- _ _ 



51 



Third— 



Phar%Tix, . . 



71 



Paunch.. . 



97 



Fourth— 



Pharvnx.. 



ITS 



Paunch _ ......... 



92 



Fifth- 

 Pharynx-. 



130 



Paunch . . .__ . . . . . 



117 



Sixth- 

 Pharynx- . .. . - ... 



151 



Paunch.. ..... 



142 



Seventh — 



Pharvnx... .-_ .... . - . - 



171 



Paunch--. . 



152 



Eighth— 



Pharvnx 



200 



Paunch.. ... .-. . 



206 



Ninth- 

 Pharynx . 



202 



Paunch .. .- _ .. . 



226 



Tenth— 



Pharvnx - . 



154 





141 







Total number of larvae headed to- 

 ward — 



10 



8 



50 

 59 



40 

 28 



18 

 23 



179 



144 



367 

 329 



295 

 337 



152 

 126 



183 

 175 



14 

 33 







1 



1,308 



Paunch - - . 



1,263 







Grand total. -.. .. 



18 



2.6 

 4.9 



3.98 



33 

 0.55 



109 



1.5 

 6.9 



3.7 



119 

 0.92 



68 



3.4 

 6.2 



4.4 



21 

 3.24 



41 



(') 



~8 

 5.13 



323 



C96 



632 



278 



6.0 

 15.9 



11.9 



358 



8.0 

 16.9 



12.9 



46 

 7.78 



47 



9.6 



15.8 



13.4 



182 

 0.26 



1 



12.0 

 12.0 



12.0 



146 

 0.01 



2,571 







Length of larvae (millimeters): 



3.6 

 12.4 



3.8 

 14.0 



6.0 

 15.5 





Maximum 









Average 



6.7 



7.4 



10.3 









Number of gullets examined 



Averagenumber of larvae per gullet..- 



30 

 10.77 



60 

 11.60 



29 

 21.79 



22 

 12.64 



697 

 3.C9 



' Larvae not measured. 



B}' reference to Table 3 it will be seen that throu.cliout tlie season 

 tlie iriajority of the lurvfe occurred in the paiincli lialf (last live 

 divisions) of tlic gullet, tlie pei'centage of the l(.»tal number in this 

 half being 07.87. It was hoped that some indication of the place 

 of entrance into and exit from the gullet might be given by a study 

 of the postion and direction of travel of the larv;e during dilferent 

 seasons but one can draw no definite conclusions from an analysis 

 of the figures. During the first live months the number of larvtc 

 heading toward the ]jharynx Wiis greatei- I ban the number head- 

 ing toward the paunch. Tiiis. together with the fact that 7(> per 

 cent of the larva; jircscnt (biiing the first 5 months u\ infestation 

 were in the lower half of i\\i'. gullet clearly indicates that the larya; 

 do not enter the gullet at the phai-ynx end. The evidence, however, 



58252^-26 4 



