408 Mr. Bracv Clark on the Insect 



feet, as tliouoh by enchantment. Then for a while thej?^ would 

 be quiet ; then, again, they were seen most furious, and this 

 with so general and regular a movement, that no army would 

 have surpassed their exercises in uniformity." 



Linnœus further states, in the Lachcsis Lapponica, respecting 

 the eftects produced by this sort of Œstrus, that in passing after- 

 wards into the Lapland alps he observed a Rein-deer, which was 

 loaded with his own package, frequently to stop short and 

 become perfectly quiet and motionless as a pillar of stone, or 

 one suddenly struck with catalepsy ; the head held straight out, 

 the ears upright, the eyes fixed ; nor could he by any ill treat- 

 ment be induced to proceed ; but in a little while he would 

 again resume his march. Where, I would ask, is the Tubanus, 

 or Conops, that could produce effects like these ? or what natu- 

 ralist, at all acquainted with the operations of Nature herself, 

 could confound the dissimilar eftects produced by these several 

 insects ? 



Linnœus further says, that in the Rein-deer fly he saw the 

 ess held out "like a white mustard-seed" at the end of the 

 abdomen, which, if true, fully confirms the supposition that 

 there can be no infliction. 



The Œstrus hcanorrhoidalis and (Kstrits Ov'is, in performing 

 their otïice of ovi-deposit, are also equally irritating and pecu- 

 liar, as I have shown in the paper above alluded to, in the 3rd 

 volume of the Society's Transactioiis. 



I avail myself of this opportunity in conclusion, to state, in 

 addition to my former remarks on this genus, that it appears to 

 me, as there is no aculeus or weapon of infliction at the end of 

 the abdomen of the female of the Oestrus Bovis, that the egg is 

 simply thrust down among the hair, till it meets the skin, and 

 that then it is affixed to it by a glutinous liquor secreted at the 



same 



