ON SOME ANIMAL PARASITES IN BRITISH GUIANA. 



187 



Tabanus caiemiensis, F. This species is very occasionally met with, on the coast- 

 lands while attacking stock. In some of the interior districts it is common and readily 

 attacks man. 



Tabanus leucaspis, Wied. Of rare occurrence within the forest area, where it has- 

 been observed to attack man. 



Tabanus ochroleucus, Mg. This peculiar Tabanid is frequently taken in human 

 habitations, being attracted there by artificial hght. It has been known to attack man. 



Tabanus frifascia, Wlk. Closely allied to T. trilineatus and with very similar habits. 



Tabanus oculus, Wlk. One specimen of this insect has been taken in the interior 

 districts while attacking man. 



Family Anthomyidae. 



Mydaea pici, Macq. The larvae of this fly are subcutaneous parasites of birds, 

 such as the Kiskadee {Pitangus sulphuratus) and the Twa-Twa Slave {Aryzoborus 

 tonidus) on the coast-lands. 



Fig. 3. Tabanus dcsertus, Walk., $, X 4. 



Family Muscidae. 



Stoitwxys calcitrans, L. In all parts of the coastal area and in many of the inhabited 

 areas of the inland regions this fly is of common occurrence. About stables in 

 Georgetown, and particularly about the mule stables and compounds on the sugar 

 estates, numbers of these flies are continually active, more especially in the early 

 morning and evening hours. In the absence of other food supplies it will readily 

 attack human beings and often proves most irritating. No decided increase in its. 

 numbers has been observed at any special season of the year. 



Family Hippoboscidae. 



A number of these flies are known to infest different kinds of birds and some 

 mammals, but their activity, and the manner in which they quickly leave their 

 host at its death, renders their capture extremely difficult. 



Lynchia maura, Bigot. Frequently found on domestic pigeons. 



