ENTOMOLOGICAL NOTES 

 IL 



ON THE ANATOMY 



OF 



THE GENUS TRIATOMA. 



Salivary apparatus 



by 



DR. ANTONIO LUIS do B. BARRETO. 

 Aoxil. Assistant of the Instituto Oswaldo Cnu 

 ^Plates 8-12;. 



In studying the salivary apparatus 

 of the genus Triatoma we began by dis- 

 secling the specimens under liquid; 

 this allows to observe the arrangement 

 of the different parts of the apparatus 

 in situ and to follow the delicate excre- 

 tory ducts which connect the same. Need- 

 less to say, much labour and patience 

 were required to prepare these delicate 

 and fragile organs. 



The positions of the different parts 

 of the salivary apparatus in relation to 

 the digestive tube were observed by 

 means of stained sections of the thora- 

 cic block, embedded in parafine, after 

 the indispensable fixation in 10 0/0 for- 

 3110I. 



Inclusions of the different glands 

 in paraffine and celloidin, after fixation 

 in sublimate-alcool, furnished sections 

 which were used for histological purposes 

 after staining with hematoxiUn-eosine. 



The salivary apparatus of the genus 

 Triatoma is found at the level of the an- 

 terior part of the digestive tube and 

 does not reach beyond the proventriculus. 

 It is composed of three pairs of sym- 

 metrical glands, which differ in shape and 

 position ; they are connected by a system 

 of excretory ducts and open into a small 

 idngle organ, known as salivary pump, as 



