132 



There is a true Cossus with mottled upper wings, and yellow 

 under wings, black at the base and inner margin, — Mobinice, ^'? 

 Here is also a large moth (ex. alar. 4 in.) apparently allied to 

 Cossus, which I do not at all know ; its wings are more pointed. 

 The anterior are white, mottled or clouded with fuscous, which 

 forms almost a transverse bar near the middle, and a darker 

 cloud or two near the outer margin. Cilia dirty white, with 

 fuscous dots. Posterior wings pale fuscous. Cilia as in an- 

 terior wrings. Body pale fuscous, the incisure of the abdomen 

 darker. Antennae setaceous, 9 ? 



You will see above, outlines of two or three larvae. [They 

 are figured by Doubleday in Newman's Entomologist, and de- 

 scribed on p. 55, etc.] You will observe that the first, 60 [^He- 

 terocampa Astarte Doubl.], is very unlike Staurojous, and must 

 necessarily lead to the formation of a new genus. Stephens 

 thinks so. I would suggest the name Balia (/S'a/'.rJ?,) macido- 

 sus, velox \_Heterocampa Doubleday, Entomologist, p. 55'\. In 

 Stauropus the anal tuft of the male is larger, and the antennae 

 of S more pectinated ; also the abdomen of the 9 is tufted, in 

 this not. The two next larvge are of my 56. The upper ap- 

 pears to be the full grown larva, from which it would appear 

 that the young have the anal prolegs fit for use. These both 

 belong to the same genus. You will add to the description of 

 56 and 60 the following of the larvaa : — 



60. Larva green, dotted all over with dusky spots. Back 



the wing, especially near the anal angle. The palpi nearly similar to Cossus, but less 

 hairy. 



Uepialus difTcrs in the neuvation of the wing?, and also in their texture. The short 

 monilrform antennae of all our species, save one, easily distinguish it. Palpi and 

 maxillffi none. II. sylvinus has short, pectinated antenna;, and probably ought to 

 be a distinct genus. In habit it differs materially from Cossus and Zeuzera. Both 

 the latter have internal feeding larvre, and sit generally on the trees on which the larv£E 

 have ted. Hqnalus has a subterranean larva eating the roots of vegetables. The perfect 

 insects fly low over the grass, often making a segment of a circle in their flight. The 

 motion of Ilcpialus hectus, $ , is exactly that of tbc ball of a pendulum. They fly 

 early, sometimes as soon as sunset. They sleep on the blades of grass, or on the shoots 

 of brushwood. 



