September, tgoo,] 



PSYCHE. 



107 



trally, the bands incised and nearly inter- 

 rupted by the subventral fold, that of joint 

 lo completely so. Edges of bands irregular, 

 but not diffuse. Legs all white, the abdom- 

 inal ones with dusky shield.s; anal plate 

 white. Tubercles small, dark, the setae 

 short, stiff with swollen tips. Segments 

 finely annulate, as much as 20; incisure part 

 of segments smaller than the central part. 

 Six setae on cervical shield; ia and iia of 

 thorax small, the rest normal, no subprimar 

 ies. On feeding, the white parts, except the 

 thorax, become faintly greenish; the black 

 bands pale a little and a darker patch appears 

 anteriorly subdorsally between warts iand iii. 

 Thorax in some a little tinted with salmon 

 color. Still later the bands are pale slaty, a 

 narrow brown addorsal streak appears and 

 some brown flecks subdorsally and subven- 

 trally. 



Stage II. Head white with a few black 

 specks, the larger ones forming an arc from 

 ocelli above apex of clypeus; rounded, not 

 bilobed; width .5 mm. Body white, the 

 food showing faintly green; posterior rims 

 of joints S to 9 ocher yellow; a fine double 

 blackish dorsal line, cut at the incisures, the 

 ends bent in to form a series of dorsal paral- 

 lograms, the cuts only at the ocherous inci- 

 sures; a series of black subdorsal spots, a 

 small double one anteriorly and two larger 

 single ones medially and posteriorly on the 

 segments, the latter joined by a slaty shade 

 into a somewliat dumbbell-shaped spot, the 

 marks confused and contracted at the ex- 

 tremities. A similar subventral row, but 

 smaller and the anterior spot obsolete; a 

 medio-ventral line, double, widened a little 

 in the centers of the segments. The ends, 

 joints 2 to 4 and 10 to 13 and feet appear 

 simply white, peppered with black. Later 

 the ventral ground color is pale green, the 

 dorsal pale blue. 



Stage III. Head round, white with a few 

 black dots, three on each side of clypeus, a 

 curved row of four from behind ocelli to apex 

 of lobe and a smaller pulverulent one on the 



posterior edge; width 9. toi.omm. Body 

 bluish white dorsally, pale green ventrallj', 

 the incisures of joints 5 to 10 with bright 

 orange bands; marks black, finely streaked 

 on the numerous (about 25) annulets, dorsal 

 loops, subdorsal spots (the two posterior 

 joined) and ventral spottings as before. 

 Tubercles and setae black, obscure, the latter 

 rudimentary ; iv stigmatal posterior. There 

 are slight orange blotches in the somewhat 

 broadly pale stigmatal region. Ends with 

 double dorsal and single lateral streaked 

 lines. 



Stage IV. No essential change. Head 

 1.4 mm., darker, the orange marks more ex- 

 tensive. Head rounded, bilobed, clypeus a 

 little depressed; head erect, free from joint 

 2. Body pale greenish white in ground, but 

 the inarkings predominant. Slender, uni- 

 form, cylindrical, the segments about 25- 

 annulate, all the marks cut into patches by 

 the annulets. Double dorsal, broad lateral 

 and broad obscurely double subventral 

 bands, broken into the loops and spots of 

 the previous stages, but less distinctly, being 

 more connected. Orange in the extended 

 incisures and more or less of it also dorsally 

 and laterally and even ventrally in spottings 

 between the black marks. Cervical shield 

 and plates without orange. Anal plate and 

 legs more finely spotted. Tubercles small 

 and with spiracles black. Setae obsolete. 



Pupation in the ground. Food plant 

 Randia nculeata. Larvae from Palm 

 Beach, Florida, eggs Jan. 12, mature larva 

 Feb. 17, though others lingered much later. 

 Probably breeds continuously. 



Occurrence of Machilis variabilis in 

 M.MNE. — It may be as well to note the occur- 

 rence of this Thysanuran in Maine. I was 

 informed by Dr. H. S. Pratt that he had 

 found several of them running over the rocks 

 at Little Flying Point, Freeport, Maine, and 

 from his account I have no doubt it is this 

 insect. It has not before been recorded north 

 of Salem, Mass. — A. S. Packard. 



