ANTENNiE OF LEPIDOPTERA. 33 



clothed, even to tlioir distal ends, where the scales from three sides 

 unite to form a thick tuft extending- beyond the end. The pectina- 

 tions are ventral, and at or near the distal edge of the segments. 

 Euclea querceti is peculiar in having the ])ectinations of the ce])halic 

 side of the antennte flattened and nearly us broad as the length of 

 the segments, of which tlu'y form a part. We find in the Eucleidae 

 au unexpected development of cones. They are long and slender, 

 and are often several pointed at the apex as in the jNIegalopygidie, 

 Fig. 43. Some species have several to a segment. In the jjectinate 

 forms the cones have migrated to the apices of the pectinations, 

 where they are protected by the thick tufts of scales before men- 

 tioned. Pits are very rare, seldom more than one or two to a seg- 

 ment, and then only on a few segments. I have been unable to find 

 any in Euclea querceti. 



The antennie of the Euclcida* differ markedly from those of the 

 Cossidse and Psychidie. Though not supplied with numerous sense- 

 hairs of the second type, they resemble the antennae of the Megalo- 

 pvgida? quite closely. A similarity of the surface covering; of the 

 character of the cones ; and, whei-e they occur, of the pits also, 

 indicate a relationship between the two. 



The Pyromorpitid.e. — The Pyromorphida3 have a characteristic 

 form of antenna which can be easily recognized. The segments of 

 the clavola are not enlarged towards their distal ends, and in some 

 forms are even gradually contracted near the joints. The pectina- 

 tions are comparatively short, are cylindrical and almost clavate in 

 form, and are contracted at their bases where they meet the shaft, 

 so much so that they appear to be articulated with it. The base is 

 thickly clothed with broad, deeply emarginate scales, and the dorsal 

 and lateral surfaces of the shaft and pectinations of the clavola also 

 are covered with a thick coat of scales arranged irregularly. On 

 the pectinations the surface of the chitin is divided into a series of 

 irregular imbricated plates with their surfaces broken up into points 

 which give the appearance of longitudinal striatious. Both the 

 chitin and the scales are quite heavily pigmented with dark brown 

 or black, and this in addition to the irregularity of the surface nudges 

 it difhcult to see as clearly as desirable. I have been unable to find 

 any cones in these forms, but am not at all certain that they do not 

 occur. Pits are present, and are broad and shallow, with convex 

 bottoms and short, pointed rods rising from their rounded apices. 

 Hairs of the first type are ])articularly abundant, and there are a 

 few of the second. 



TRANS. AM. ENT. SOC. XXIII. (5) FEBRUARY, 1896 



