of the Amazon Valley, 
271 
especially vary much in relative position. In speci- 
mens which agree with the type of Olivier^ the third spot 
is far from reaching the level of the apex of the second. 
I find this character only in specimens from Cayenne^ 
Para_, and South Brazil; but the South Brazilian differ 
in other points^ and perhaps merit specific separation. 
In other examples, the third spot at its base is nearly or 
quite level with the apex of the second. This form occurs 
with the type at Para, and is the prevalent form on the 
Upper Amazons. Lastly, examples occur in which the 
third spot is so much advanced, that it is parallel with 
the second for about one-fourth their respective lengths. 
Such examples are furnished by Venezuela and the 
Upper Amazons. These approach in the position of the 
spots E. longipilis and the allied species, but E. sex- 
maculata is a larger and more robust insect ; and besides, 
I have not yet seen specimens in which the posterior 
spots are quite contiguous.* 
Sub-fam. Sph^riinji. 
Genus Nyssicus. 
Pascoe, Trans. Ent. Soc., 2 ser., v. 17 ; Lacord. Gen. 
viii. 314. 
1. Nyssicus quadrinus, n. sp. 
Minus elongatus, depressus, testaceo-fulvus, nudus ; 
capite crebre punctate ; thorace lateribus breviter obtuse 
tuberculato, supra inmquali plagiatim punctulato, linea 
mediana elevata, macula nigra apud marginem anticum, 
altera ad marginem posticum; elytris apice unispinosis, 
angulo suturali nullo, supra sparsim setosis punctulatis 
* The following may be added to the now numerous list of species of 
this genus 
Ehurodacrys arcifera, n. sp, 
Elongata, gracilis, depressa, fulvo-testacea ; thorace elongate, trans^ 
versim punctate -rugo so, linea dorsali lasvi, spina minuta laterali ; eljdris 
apice truncatis, spina laterali elongata obhqua nigra, suturali minuta 
fulva, supra punctatis nitidis, sparsim longe pilosis, linea eburnea recta 
basali, alteris duabus longioribus pone medium, interiori recta, exteriori 
duplo longiori, arcuata ; femoribus elongatis gradatim incrassatis, inter-- 
mediis et posticis spina longa nigra armatis. 
Long. 8 lin, (J • 
Hah , — Santa Ed, Minas Geraes, A Dom, Eogers capta, 
