P80E0PH0EA POSTICATUS 549 



Origin Ai, Description of Janthinosoma echinata: 



?. Head covered with flat spindle-shaped yellow scales, mingled with black hairs, a 

 few long yellow hairs projecting between the eyes, many upright forked scales at the 

 back. Eyes with deep purple reflections, bordered posteriorly with silvery-white 

 scales. Antenna brown, basal segment deep brown, second slightly inflated, with a 

 few short black hairs. Proboscis black, with violet reflections, speckled with yellow 

 scales. Palpi densely covered with black and yellow scales, the latter predominating 

 in two basal joints. Clypeus black. Prothoraclc lobes with a few golden scales and 

 black hairs. Mesothorax black, with spindle-shaped golden scales scattered over its 

 surface, two denser clusters of these scales on the front margin adjoining the pro- 

 thoracic lobes, also at the posterior margin between the lateral and mid bare spaces. 

 Two narrow median bare lines running over three-quarters length of the mesothorax, 

 broadening as they approach its anterior margin; a median and two lateral bare 

 areas at the posterior margin. A row of long black hairs above the wing insertions ; 

 a number of short black hairs distributed in no definite order over the mesothorax. 

 Scutellum black, clusters of golden scales on the mid and lateral lobes; six to eight 

 black hairs spring from the posterior margin of the mid lobe, and three to four from 

 each of the lateral lobes. Pleura with patches of silvery-white scales. Metanotum 

 deep brown. Abdomen black, with violet reflections, basal segment with long white 

 hairs, apex of each segment bordered with a few long white hairs. Lateral apical 

 patches of white scales in the posterior segments. Venter yellow, densely covered 

 with broad yellow scales, among which are interspersed a few violet scales, especially 

 near the bases of the segments. LiCgs dark metallic violet, with well-marked knee 

 spots on all the femora. Tibiae, metatarsi and tarsi of the hind legs densely scaled. 

 Third and fourth tarsi of the hind legs white scaled. All the ungues uniserrate and 

 equal. Wings, first submarginal longer and narrower than the second posterior, its 

 stem less than half its length. Stem of the second posterior cell a little shorter 

 than the cell. Posterior cross vein more than its own length behind the mid cross 

 vein. Halteres with pale stems and knobs. Length, 5.5 mm. 



c?. — AntenuEB pale brown, second joint slightly infiated, thickly clothed with a num- 

 ber of long-stalked black scales, with fan-like heads, and long black hairs. Proboscis 

 black, with a faint band on its lower third. Palpi longer than the proboscis by the 

 two terminal joints. Two terminal joints inflated and densely black-scaled, a num- 

 ber of long black hairs along the under surface, a few black hairs on the apex of the 

 terminal joint. Antepenultimate joint inflated at the apex, a few black hairs on the 

 under surface near the apex. A single narrow band of golden scales on its lower 

 third. Terminal segment of the clasp greatly dilated in the middle. Harpes, limb 

 extending into a thin lamina at the apex, from the internal border of which a num- 

 ber of long black hairs along the under surface, a few black hairs on the apex of the 

 attached. Harpagones with strong recurved tips and two stout thom-like tubercles 

 on their convex surfaces. Unci deeply chitinized adherent along their internal 

 borders. Setaceous lobes absent. Ungues of the fore and mid tarsi unequal, the 

 larger with two teeth, a long blunt one and a small basal one; the smaller with a 

 minute basal tooth. Ungues of the hind tarsi uniserrate and equal. I<ength, 5.5 mm. 



The following points were noted in the adult larva: Fully grown adult larva 

 nearly 5/16 inch long. Antennae large and prominent, longer than the head, strongly 

 curved about the middle, deeply fuscous except at the base. Slightly inflated in the 

 lower half. Tuft at the middle of about six fine feathered hairs not exceeding half 

 the antennal shaft of length. Apex with three or four short spines. Surface covered 

 with stout chitinous spines. Mentum deeply infuseated, somewhat narrowly tri- 

 angular; teeth dark and numerous; apical tooth large and prominent. Both upper 

 and lower epistomal hairs are double and feathered, extending beyond the margin of 

 the head. Anteantennal tuft of 8-10 feathered divisions. Body glabrous except 

 for a few small scattered dendritic hairs. A small dorsal patch of minute thorn-like 

 spines, arranged in curved lines, on each segment from the second to the seventh. 

 Lateral hairs of the abdomen paired and flattened; on the anterior segments each 

 hair is large and 4- to 7-branched, hairs becoming smaller and with fewer branches 

 on the hinder segments. Comb of six or seven scales in a curved row, the largest 

 In the middle. Central scales joined by a thin broad chitinous band, the upper 

 and lower scales separate, base of each scale oval, sides coarsely setose below, the 

 apical free border with one curved stout central spine and two to six much shorter 

 lateral spines. Air tube fusiform, inflated, deeply infuseated, devoid of hairs, about 

 four times as long as wide (at the base) ; pecten rows of four well-separated teeth in 

 each, a fifth small pair at the extreme base in some specimens; rows one-quarter 

 length of tube; upper two pairs of teeth with two or three smaller denticulations on 

 the inner side, lower pairs with denticulations on both sides. Band ringing the anal 

 segment about as long as broad; barred area running along whole length of the band. 



