8 THE CANADIAN ENTOMOLOGIST. 



of grass, singly. Colour, a pale creamish-white, assuming a darker tinting 

 as the young embryo develops; hemispherical, rather low, the base broadly 

 flattened. The egg appeared to be marked with vertical ridges, but I 

 could not make sure of this with a low-power glass. Just before the 

 emergence of the young larva the egg is opaque, the black head of the 

 larva being plainly visible. One egg hatched July 3, another July 8, and 

 the third July 9. The young larva at once attacks the egg, devouring all 

 but the basal portion. 



YouJig larva. — Length, about i mm.; body cylindrical, slender, 

 tapering from the middle quite rapidly posteriorly, and less so anteriorly ; 

 head jet black, large, subglobular, about one-third larger than middle of 

 body ; neck tightly strangulated ; colour of body pale yellowish-white, 

 sparsely covered with rather long concolorous hairs ; legs and prolegs 

 same colour; a greenish tint is assumed as the larva begins to feed. The 

 first moult takes place in from three to five days. 



After fii-st moult. — Length, about 2.5 mm ; head as before, but now 

 only slightly larger in breadth than body ; body as before, but the colour 

 a rather daik grassy green, the three posterior segments with a somewhat 

 yellowish tinge; legs and prolegs greenish-yellow. The larva forms a nest 

 at the apex of the blade, drawing the edges together by fine white strands, 

 the distance of the tube thus formed varying according to the age of the 

 larva. The larva appears to be able to walk as readily backwards as 

 forwards. Although I found many eggs and larvae, I did not succeed in 

 bringing the latter past the second instar. 



Mr. Victor L. Clemence has given me several examples of the second 

 brood of bellus, taken July 18 and 26, in the Chiricahua Mountains, 

 Cochise County, Arizona. These have the fringes of a pale, dirty, 

 creamish colour, answering perfectly to the description of phylace 

 Edwards. It is thus obvious that hellus is the first brood ^indi phylace the 

 second, the latter having seven years' priority. But as representatives of 

 the two broods are so strikingly distinguishable, it is appropriate that the 

 first brood can be termed form bellus and the second Master phylace. 

 M. amibis Godman and Salvin, described from Orizaba, Jalapa and 

 Omilteme, in Guerrero, Mexico, is very probably a synonym of phylace^ 

 but as I only know it from the very brief original description, I cannot be 

 definitely sure of this. Mnaseas ( Thymelmis) bicolor Mabille, from 

 Mexico and Central America, may be another species that will have to 

 be referred to the synonymy oi phylace. 



