300 



its dorsum. Of these appendages, the third, fifth and seventh pairs 

 project greatly beyond tlie others, the third and fifth nearly straight, 

 but with the tips hooked backwards, the seventh regularly curved for- 

 wards. Each apjjendage has the hair parted down the middle of its 

 upper, and so far as visible, of its lower surface, so as to point in contrary 

 directions, and they are very slightly attached to the body, and are shak- 

 en ofFby the insect before proceeding to spin its cocoon. Beneath, above 

 each spiracle, is a divergent bunch of pale-brown hair. Length (not 

 quite full grown) .38 inch. Width, including appendages, .38 inch ; 

 without appendages .20 inch. Length of cocoon .35 inch; breadth 

 .25 inch. Food-plant, wild cherry. One specimen. Comes very near 

 to the larva of L. pitJiecium Sm. Abb. in the structure of its appen- 

 dages, and seems to differ chiefly in the seventh appendage curving 

 forwards and not backwards, and in the insect being much smaller. 

 And yet the imago differs from Limacodes in the antennaB being pec- 

 tinate, and in the remarkable shape of the hind wings, and will, prob- 

 ably, when the ? is known, form a new genus. Two larvae, which 

 occurred on the oak in the autumn of 1862, apparently belong to 

 another species allied to piihecium, though I failed to breed them, one 

 having died after spinning, and the other having produced from its 

 cocoon, August 4th of the following year, a common species of 

 Conops (Diptera) with the middle third of its abdomen sanguineous, 

 perhaps C. analk Fabr. These latter larvae were much larger than 

 that of hjalinus, measuring, when recent, .70 inch ; they agreed with 

 it in having apparently nine pairs of appendages, the last pair very 

 short, but they had only the third and sixth pairs projecting beyond 

 the others, and both these pairs were curved backwards, with the ex- 

 treme tips of each slightly hooked forwards. We may call this larva 

 Limacodes ? teiradactylus. 



HiPPARCHiscus, n. gen. 



(Belongs to the family Geometridae.) Palpi long, projecting 

 beyond the head about one diameter of the eye, the basal joints hairy, 

 moderately long, and gently curved upwards, the terminal joint not 

 hairy, short and porrect. Antennm long, e.xtending nearly two-thirds 

 of the way to the apex of the expanded front wing, bipectinate three- 

 fourths of the way to the tip in d' and subserrate on the other one- 

 fourth, simple or scarcely subserrate in ?. MaxillcB nearly as long 

 as the antennae. Abilomen d with a terminal brush. Legs with the 

 hind tibiae d furnished with a large fan-like brush of hairs ; front 

 tibiae d with a small brush of hairs ; tibial spurs normal, but minute 

 on the anterior legs; first tarsal joints fully as long as the four follow- 

 ing put together. Wings simple ; front wings subtrigonate, the inte- 

 rior margin perfectly straight, and the costal, interior and terminal 



