PAMPIIILIDI : THE GENUS THYMELICUS. 1691 



row beneath of live or six long spines. Tarsal joints 1, 2, 8. 4, 5, excepting on tlie 

 fore legs, wliicli are 1. 2, 3, 3, 4. Fore tarsi two-tliinls tlie Icngtli of tlic liind tarsi, 

 •whicli are scarcely longer than the mitklle tarsi, all furnished l)pneath with a triple 

 row of small and delicate spines, the apical ones of each joint a little longer than the 

 others; basal joint, excepting on the fore legs, a very little shorter than the others to- 

 gether; second joint scarcely more than half as long as the basal. Claws small, deli- 

 cate, tapering, bent strongly in the middle and besides a little curved. Pad of 

 moderate size, roundish. Paronychia bifld, the upper lobe compressed laminate, falci- 

 form, reaching fully to the tip of the claw, twice as long as broad, not strongly 

 curved, bluntly pointed ; the lower pretty slender, equal, half as long as the claw. 



Abdominal appendages : Upper organ strongly arched or bent in the middle, rather 

 slender and nearly equal, the centrum with a deep median furrow; beyond the bend 

 nearly straight and horizontal, the hook tapering, formed of two elements, connate, 

 excepting at tip, where it is slightly upturned, and bearing at the extremity of the con- 

 nate portion a depending, compressed, laminate, triangular tooth; lateral arras connate 

 with the hook nearly throughout. Clasps broad, less than twice as long as broad, but 

 as long as the upper organ, nearly eciual, scarcely convex, furnished at tip, especially 

 above, with one or two short and stout, sharp spines. Intromittent organ heavily 

 thorned at tip. 



Egg. Moderately high, broadest at the base, narrowing iu the lower half very gently, 

 in the upper half more rapidly ; the summit slightly depressed over a sp.ace one-third the 

 width of the base. Surface broken by exceedingly delicate, slightly raised lines, into 

 roundish but somewhatangular, irregular cells ; micropyle consisting first of sixor eight 

 kite-shaped cells, slightly less than twice as long as broad, arranged around a common 

 centre, four or live of them tipped with the micropylic canals ; these surrounded by 

 angular cells, slightly larger, and increasing but slightly in size outwardly until lost in 

 the more distinct and larger cells covering the whole surface of the egg. 



Caterpillar at birth. Head large, anteriorly appressed, broadest and truncate be- 

 low, narrowed and domed above ; viewed laterally somewhat cuneiform, being deepest 

 below, gradually narrowing above; frontal triangle more than half as high as the 

 crown. First thoracic segment with a very slight break between a triangular supra- 

 stigmatal piece and the anteriorly elevated dorsal shield. Body generally of uniform 

 width, but very slightly arched; dermal appendages from two-thirds to three-fourths 

 the length of the segments, the apex extending to a very slight and gradual enlarge- 

 ment, arranged as follows: on the thoracic segments, slightly in advance of the middle, 

 anteriorly placed, a laterodorsal and a lateral row ; on the abdominal segments a lateral 

 series placed anteriorly ; an infralateral series placed posteriorly, and on all the seg- 

 ments a suprastigmatal series placed centrally. Last segment with some very long, 

 npcurved, tapering bristles. 



Mature caterpillar. Head well rounded, widest in the middle, of nearly equal width 

 on the lower half, above very regularly domed with no median excision; deepest in the 

 middle of the lower half, somewhat pinched above ; the collar scarcely perceptible ; 

 surface profusely and rather strongly and uniformly punctate ; ocelli apparently five in 

 number, three in a broad, arcuate curve, the middle one largest and nearer the upper 

 and smallest than the lower, the fourth near the base of the antennae, the fifth above 

 this and forming a right angle with it and the first ; first joint of antennae large, mammi- 

 form; the second short, cylindrical, nearly twice as long as broad; third much smaller, 

 cylindrical, twice as long as broad; the last a miniature of it in every particular, bear- 

 ing even a short bristle; apical bristle of the third joint nearly twice as long as the 

 antennae. Body long and slender, the terminal segment with a rather broad ovate anal 

 plate, largest from the fourth to the sixth abdominal segments, tapering very gently iu 

 either direction ; first thoracic segment with a transversely grooved tlioracic shield of 

 nearly equal width, extending from just above the spiracle on either side, the trans- 

 verse groove curving forward below and partially separating a little piece about as 

 large as the spiracle; the latter large, round ovate, elevated, crateriform; the other 

 spiracles similar but far more minute and relatively more elongate; that of the eighth 



