Revision of the American Notodontidx. 289 



followed by a very angular and more heavily marked complete line ; 

 two outer angular and irregular black lines somewhat suffused to- 

 wards the apex, where there is some greenish-yellow between the 

 lines ; a terminal row of black spots. Secondaries and fringe white 

 in the g with a black point at the anal angle ; in the $ dark smoky 

 grey, with the fringe white spotted with black. 

 Expanse q 31 m.m. ; $ 33 m.m. 



Hob. Castro, Parana. 



Centra rivera, sp. nov. 



Allied and very similar to Cerura argynnis, Schaus. Larger and 

 the spot on inner margin of primaries containing a black pupil. The 

 9 has the secondaries quite black and the fringe greyish ; there are 

 also black ventral spots on the abdomen. 



Expanse £ 38 ; $ 40 m.m. 



Hob. Rio Janeiro; Castro, Parana. 

 Described from 2 $ $ and 2 $ $ . 



Centra grandis, sp. nov. 



Head black, frontal tuft yellow. Collar black. Thorax creamy- 

 white with two black spots posteriorly. Primaries white shaded 

 with silky-brown from the cell outwards and also between the 

 median and sub median veins ; a large black, basal, costal spot, 

 followed by a narrow angular black line slightly interrupted ; a 

 large oblique black spot from the costa to median vein, and a smaller 

 black spot on the inner margin, these followed by a narrow angular 

 interrupted black line ; a very irregular median black line, and two 

 outer black lines, the one nearest the margin broadening into black 

 patches at the inner angle, below vein 4, and from above vein 

 5 to the apex ; a terminal row of elongated black spots. Second- 

 aries brown with a terminal row of white spots and two curved black 

 marks on the inner margin above the angle. 



Expanse 55 m.m. 



Hab. Peruvian Amazons. 



Betola, gen. nov. 



Antennae p ctinated for two-thirds of their length. Palpi porrect, 

 third joint small. A high frontal tuft. Abdomen stout, long ; anal 

 tuft long, bifurcate. Primaries broad at the outer margin, slightly 

 dentate ; small areole from before end of cell ; 6 from end of areole. 



TRANS. ENT. SOC. LOND. 1901. — PART III. (SEPT.) 20 



