OF WASHINGTON. 301 



nine lateral horns, tapering and constricted at base, shortest at 

 the ends without a longer terminal pair. Nine subdorsal horns, 

 represented as spherical. Glover remarks: "Larva has a 

 peculiar transparent, glass-like appearance when living." Both 

 were taken in Maryland, on oak, in September. 



What must be the same larva has been described in the notes 

 of the Department of Agriculture, under the number 3242, Lima- 

 codes on Oak, Oct. 3, 1883. The description runs as follows: 

 " General color of the body pearly white, with a bluish, rather 

 broad dorsal stripe. Subdorsal space [lateral space] slightly 

 purplish, not so intense as the dorsal stripe. Ventral surface, 

 head, and thoracic joint [joint 2] grass-green ; mandibles, labrum 

 and inner base of antennae brown ; ocelli black. Antennas rather 

 long, yellowish-brown. Spiracles circular, dingy yellow. In 

 the middle of each joint on the dorsal blue stripe is a double 

 broadly V-shaped mark, the point of the V anterior. On the 

 sutures in this same blue stripe are two dusky points, and a sin 

 gle stronger one along the upper margin of the medio-dorsal 

 shade [what is meant by this?] Very strong supra-stigmatal de 

 pressions or pits cause a bulging of the sides, and from each promi 

 nence arises a sea-green, translucent tubercle, broad and rounded 

 \_i. e. contracted ?] at base, and gradually tapering to point and 

 fringed with long, delicate, glass-like hairs. Discally [/. e. sub- 

 dorsally] there are two very singular compound glassy tubercles 

 with swollen bifid bases, inner bulbous branch and outer long, 

 curved, gradually tapering one, all rather thickly clothed with 

 beautiful glassy, soft hairs, more or less curved at tip. These 

 tubercles are easily detached, and seem to have their root partly 

 in the dusky spot along the upper side of the dorsal region and 

 partly in the V-shaped mark along the medio-dorsal. Those 

 from the prothoracic joint [/. e. joint 3 or '4?] and from the anal 

 and penultimate joints [12 and 13] are straighter than those from 

 the sides, and are directed either anteriorly or posteriorly. The 

 tubercles produce a most beautiful vitaline effect. The creature, 

 as it moves, seems to be one mass of delicate floss of finely spun 

 glass, almost as broad as long. The surface of the body, under 

 a high power, is seen to be minutely granulated." 



Two dead and dilapidated larvag were preserved in alcohol. 

 The better of these possesses the subdorsal horns only on joints 3, 

 12, and 13 ; the lateral ones are nearly all present, at least on one 

 side, seeming to be on segments 3, 4, 6-12. The arrangement is 

 either as in Phobetron or Calybia, the specimens are too poor to 

 tell which ; but the lateral horns are long and functional, though 

 shorter than the subdorsals. They are but little subordinated, 

 thus showing this larva to be a more generalized type than either 

 of the known genera of the " tropic hairy Eucleids." As to the 

 probable imago of this interesting larva, a guess would be haz- 



