XY:\rPIIALTXAE : THE GENUS BASILARCHIA. 253 



squarely docked, about tliree times as long as broad and l)cariiig at its outer extremity 

 a fourth exceedingly minute joint, less than twice as long as In-oad, cylindrical, 

 squarely docked ; the third joint also emits a line, long hair from the apex; ocelli, at 

 least in the adult, five in number, four of them arranged in a broad, regular curve, its 

 convexity forward and a very little dowmvard, the upi)er three at equal distances, 

 separated from each other by less tJian their own widtli, the fourth farther from the 

 third than the latter is from the first, the fifth between, behind, and at equal distance 

 from, the third and fourth; they are of about equal size. Labrum quite small, 

 nearly twice as broad as long, in front excised very deeply at right angles, the outer 

 edge well rounded. Mandibles very small but rather stout, the edge square and 

 exteriorly smooth, interiorly corrugated. Maxillary palpi four-jointed, the penultimate 

 longer than broad, cylindri(\al, rounded at tip ; the last minute, liemisphorical. Tip of 

 spinneret long, conical. 



Body subcylindrical, with the dorsum depressed a little, and the sides slightly com- 

 pressed and sloping; unequal, the first thoracic segment being greatly constricted, 

 much smaller than the liead, the other thoracic segments tumid both above and on the 

 sides, hirger than the others, whii-h do not taper, tlio last alidominal s(!gment a little 

 elongated and hunched posteriorly a])ove; the dorsum of the second abdominal seg- 

 ment is also broadly hunched and tumid, as is also to a less degree the eighth abdominal 

 segment. The body is furnished conspicuously with a laterodorsal row of compound 

 tubercles, one in the middle of each segment behind the first thoracic (generally ele- 

 vated to a greater or less extent on mammiform protuberances) even on the segments 

 Avhich are not specially tumid, but unequally developed, being quite small and sessile 

 on the third thoracic and the first and third to sixth abdominal segments, spreading out 

 into a corona of conical blunt wartlets, larger, more spreading, and made up of more 

 numerous (and very numerous) conical spinelets, but still sessile, on the third thoracic 

 and second and seventh abdominal segments ; on the eighth abdominal segment it is 

 still larger, .clul)bed-shaped, sessile, on the ninth abdominal a little smaller and longer, 

 club-shaped on a very short pedicel, w'hile on the second thoracic it is developed as a 

 movable, long, nearly equal, coarsely tuberculated, heavy spine, longer than the diam- 

 eter of the body, and presenting a most striking appearance, hardly to be paralleled 

 among butterfly caterpillars. Between these laterodorsal rows the dorsum is fur- 

 nished with from 12-16 miuute conical Avarts on each segment, each giving rise to a 

 very short hair, ari'anged in transverse rows, mostly on the posterior portion of the seg- 

 ment, and never placed on the dorsal line. The sides of each segment are furnished 

 with about as many moi'e similar ones, and also wath a row of suprastigmatal, central, 

 small, low, hemispherical warts, one to a segment, each bearing little raised points, and 

 an infrastigmatal row of similar but larger tuberculous Avarts ; the basal fold of the 

 legs and prolegs are also abundantly supplied with little Avarts. Spiracles pretty large, 

 obovate. Legs not very long, moderately stout, the joints scarcely tapering but suc- 

 cessively smaller, each slightly broader than long ; claAv very small, slender, slightly 

 curved. Prolegs very short and stout, fringed externally at tip Avith a roAv of closely 

 set, small, elongated Avarts, each bearing a long hair. Hooklets very small, slender, 

 compressed, strongly curved, closely set, forming about three-fourths of a circle, open 

 outAvards, from 30-3.5 in number on the A-entral legs, arranged in a single row. 



The tul)ercles of the body become more prominently developed from stage to stage, 

 just as those of the head been described as doing. In the second and third stages 

 the nearly uniform character of the armature of the first stage is retained, the 

 whole body bristling Avith transverse rows of thickly crowded raised points, Avhich 

 afterwards either disappear or change to minute Avartlets. 



Chrysalis. VieAved from above, head and prothorax tapering but slightly; ocellar 

 prominences continuing the body-curve, ridged rather heavily on the lateral and loAver 

 margins, the loAver margin roundly and rather deeply excised in the middle third : infe- 

 rior face of the head a little holloAved or sunken ; on a side vieAV tlie ocellar prominences 

 are straiglit and horizontal on the inferior border, broadly curveil, and beloAv perpendic- 

 ular, on the anterior border. Mesonotum hiirh. pretty strongly and regularly arched, but 



