DISTANT— EHYNCHOTA. 



37 



Subfamily Gerrinse. 



Division Gerrinaria. 



23. Gerris {Llmnogonus) cereiventrls. 



Gerris cereiventris, Sign, in Maillard, Notes sur I'lle de la Reunion, p. 30 (1862). 

 Mahe, Praslin. — Originally described from Reunion. 



21. Oerris {Limnogonus) dolosa. 



Limnogorms dolosus, Bergr. Rev. d'Ent. 1893, p. 203. 

 Coetivy, La Digue {fide Bergrotli). 



Division Halobatinaria. 



25. Malobates alluaudi. 



Halohates alluaudi, Bergr. Rev. d'Ent, 1893, p. 204. 

 Coetivy, Amirante, Chagos Islds. — Mali6, Port Victoria, and Praslin [fide Bergroth). 



<J^ 



Family Reduviidse. 



Subfamily Ectrichodiinse. 



MASCAREGNASA, gen. nov. 



Head moderately short and broad, the postocular much longer than the anteocular area, 

 the central lobe distinctly prominent, obliquely and somewhat couvexly narrowed from 

 eyes to base, where it is attached to a distinct pronotal collar ; ocelli close together on 

 disk, almost between posterior margins of eyes ; antennae with the first joint about as 

 long as head and pronotum together, second joint slightly shorter than first, remaining 

 joints mutilated in unique typical specimen ; rostrum reaching the anterior coxse, 

 robust, basal joint short, second not quite reaching base of head ; sternum and abdomen 

 beneath with a central longitudinal impressed line ; pronotum with the posterior lobe 

 considerably longer than the anterior lobe, the latter armed with two long acute spines 

 on each lateral margin, and a shorter more erect spine before and almost between them, 

 the posterior lobe obliquely deflected from base towards the anterior lobe, with a central 

 longitudinal impression, two rounded callosities on its posterior margin, the lateral 

 angles subspinously prominent, the basal margin moderately excavate before scutellum, 

 its lateral margins nearly straightly oblique; scutellum broader than long with three strong 

 foveations at base, the central one broadest, and with two apical spinous angulations 

 Mhich are a little curved inwardly ; tegmina not quite covering the margins of the 



