MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 81 



The specimen kindly sent me by Dr. R. E. Kunze from Phoenix, Ariz., though it is deprived 

 of its head, agrees with my ligure (2) of the larva of ^1. Isias. It differs in respect to the armature 

 from my drawing on PI. XLIX, ligs. 3, 3a, in the following respects: The thoracic horns are 

 provided with more spinules, which are not confined to the base, but are scattered along nearly 

 to the tip of each horn; the spines on abdominal segment 1 are larger, and but slightly smaller 

 than those on segments 2-7. As regards segments S-10 my larva agrees well with my figure 2^', 

 (PI. XLIX) though the dorsal tubercles on segment IX are larger. 



Doctor Kunze has been obliging enough to send me the following description of the living 

 larva? collected hy him: 



Description of larva: In general appearance tlie larva reminds one of a ycjung Cilhemiiia ii'(/tilis. 



Face oval, green, a white line eacli side of triangular space ami next to that a narrower black line of obovate 

 shape. Mouth parts blackish. On first segment a diadem of silvery granulations from spiracle to spiracle, all of 

 which latter are black throughout. On second thoracic segment are two spinose tubercles, 6 mm. long, on each side, 

 four in all. On third thoracic segment are four tubercles, two on each side, spinulated like the others, and 6 nun. long. 

 The dorsal tubercle is purple or violet, and the lateral one of apple green throughout. Spinules of dorsal tubercle 

 black, spinules of lateral one green. Segment 4 and inclusive of 11, have on each side one above the other, two 

 silvery, short tubercles, the upper of cuneiform shape, of which the inferior rests on the infraspiracular line. The 

 inner side of these silvery tubercles is liright red. .^^ crescent of silvery granulations, just back of the tubercles of each 

 segment 4 to 11. On the jjenultimate segment (12), a spinulated tubercle, 4 mm. long, reddish brown at base, green 

 at tip, spinules whitish at base and green above. Three small silvery tubercles on last segment above anal plate. 

 Dorsal and lateral surface smooth, apple green. Abdominal parts concolorous. Prolegs much granulated from base 

 to feet, the granulations green. Thoracic legs, green, the base only with green granulations. Infraspiracular line 

 pink, with lilac reflections. Spiracles black. Between the silvery dorsal tubercles of each segment, two silver 

 granulation.^. The anal plate is lined by a triangle of white granulations. Clasper of the prolegs brownish. 



Length of larva at rest, September 30, 1904, IJ inches (29 mm.) ; length of larva in motion, September .30, 1904, 

 IJ inches (32 mm.); width of larva j% inch .September 30, 1904 (5 mm. ). 



Found on Parhimonia microphyl/a, September 28 and 29, 1904, Phoenix desert, .\rizona. 



Last staije of Sphim/icanipiil larva — Adelocephala isiaii. — Found on a mesquit tree (I'nmjph jnlijiom), October 24, 

 1904, in the garden of Dr. R. E. Kunze, Phoenix, Ariz. 



.\ntenn;e whitish, mouth parts brownish. The lateral thoracic tubercles on the second and third segments white 

 and but little spinose. Dorsal thoracic tubercles pink, tipped white, and green at the base, equally so, but little 

 spinose. The small cuneiform, silvered and pink-tipijed tubercles on the segments of dorsal row 2 mm. long. 

 Those of the subdorsal row IJ mm. long, the points of all silvered. The tubercles had an upward direction. The 

 spinose tubercle on the penultimate segment pink, tipped white, and green at base. Infraspiracular line violet 

 lavender; spiracles black, edged with white. Thoracic feet green, claws brownish. Abdominal feet green at the 

 base; hooks brow-nish. General color an apple green. No other changes observable. Length at rest, 45 mm. ; length 

 in motion, 54 mm.; average diameter of segment, 8 mm. 



Food plants. — Parkinsonia microphi/Ua, native name "Palo ^'er(I(■,"' and mes(|uite tree 

 [Prosojns juliflora). (Dr. R. E. Kunze). At Brownsville, Tex., it was found by Mr. Doll on 

 the Mexican ebony {Acacia jlexicanJi'<). 



Geographical distrihation. — While this species was first detected within the limits of the 

 United States at Brownsville in southeastern Texas, near the mouth of the Rio Grande, a few 

 miles .south of latitude 26^ N., and opposite Matamoras, Mexico, it was next discovered at 

 Phoenix, Ariz., and its geographical range almost exactly coincides with that of A. heilighrodtil 

 (see map HI), though it has not 3'et been detected in New Mexico. In (central America it was 

 collected, in the State of Jalisco and Costa Rica (Druce); Mexico (Boisduval). 



JIahiU of the larva. — For much that we know of the transformations and habits of this line 

 species we are indebted to Doctor Kunze, who wrote under date of October 5, 1904. 



During the latter days of September he camped for three days on the Phoenix desert near 

 the mountains around Prescott, Ariz., and was fortunate enough to detect a beautiful larva 

 feeding in the hot sunshine on Pafkinsimia uiicroj^hylla, or ""Palo ^^'rd(■ " of the natives. The 

 following day he found a second specimen half a mile further away. l)ut no others. 



I looked carefully for a whole day or more, but could not detect another such, which are readily observed from 

 the two rows of silvery tubercles as bright as a mirror, glistening in the sun like gems. Fortunately I succeeded in 

 feeding the larva with a much larger-leaved species, Fai-kinsonia ton-eijana, the leaflets of which are the size of the 

 head of a shawl pin, I mailed these larva; to Mr. L. H. tloutel, of New York, at once, and trust \w received one or 

 both alive for figuring. I am sending him every three or four days a tin box of the food plant, because Parkinsonia 

 is a subtropical plant, and I know of duly two species. 



