July iSrjj,] 



SUPPLEMENT TO PSYCHE. 



Lecanium mirabile. n. sp. — $ scale about 

 8 mm. long, 7 broad, and 5 high. Nearly 

 circular in outline seen from above, hard, 

 yet soft or elastic enough when alive to 

 crush without breaking in pieces; very dark 

 brown, with conspicuous irregular rings of 

 snow-white waxv secretion, about i mm. 

 diameter. In some specimens the rings are 

 dotted witli black. In a general way it may 

 be said that the rings are arranged in six 

 longitudinal bands; their centres are more 

 or less depressed. The insect has quite a 

 strong, musky odor. Removed from the 

 twig, the insect leaves a sn)all amount of 

 white powder. 



? apparently without legs. Antennae 

 very short, cylindrical, hardly at all tapering, 

 6-iointed ; 3 longest, 4 shorter than 2, 5 

 shorter than 4, 6 very short, button-like, 

 emitting numerous straight hairs. There is 

 a false joint in the middle of 5, and an 

 obscure one in 3. 



Derm orange-brown, microscopically tes- 

 sellate, the tesserae not gland-spotted. 

 Portions of the derm exhibit numerous 

 glands, appearing as round rings situated on 

 oval discs. 



The insects, when boiled in caustic alkali, 

 give a ver^' strong, dark, madder color. The 

 young larvae in soda are pale crimson. 



Young larva oval ; when alive it has tiie 

 dorsum pale, purplish-grey, with a dark 

 band down each side, and the margin very 

 pale. 



The embryonic or newly-hatched larva 

 is very peculiar. The egg-membrane fits 

 closelv to the larva on one side, while on the 

 other it is widely expanded, being apparently 

 held in this position by a pair of very large 

 and long straight bristles projecting from 

 tlie side of the larva. When the larva is free 

 one can see that these bristles also exist on 

 the side which was adjacent to the egg-mem- 

 brane; they are, in fact, the largest stigmatal 

 bristles very greatly developed. The legs 

 of these larvae have the digitules well 

 developed. The anal ring seems to present 



numerous hairs, but in a free larva there 

 were clearly seen to be but six. The rostial 

 filaments are coiled like a watch-spring. The 

 caudal filaments in a free larva are seen to be 

 quite long, each arising from a tuft of small 

 bristles. 



Hab. This extraordinary insect was sent 

 by Prof. Toumey, whose attention was first 

 called to it by Prof. R. H. Forbes, Chemist 

 of the Arizona Exper. Station. It occurs 

 on mesquite [Prosopis Juli/iora vo.y. glandii- 

 losa) near the University of Arizona, Tuscon. 



Lecanium quadrifasciatum, n. sp — $ 

 scales crowded in a thick cluster 7 or S cm. 

 long, overlapping. Scale about 7 mm. 

 long, 5 broad, and 34 high. When alive 

 moderately soft, shiny, of a livid pinkish 

 color, with four longitudinal bands of grey 

 spots, the spots being slightly depressed. 

 There is mottling of the same character 

 below the fourth band. The bands are about 

 equally distant from one another, and the 

 dorsal bands may be closer together than to 

 the lateral. Margin immaculate, and more 

 pinkish than the rest of the scale. The 

 scales have quite a musky odor, as in 

 L. mirabile. 



Boiled in soda, the adult J gives a strong 

 madder color. Derm colorless, with small 

 round gland-spots. Anal ring with six well- 

 developed hairs. Anal plates together 

 forming nearly a square. Antennae rudi- 

 mentary, cylindrical, obscurely 6-jointed, tip 

 with several short straight hairs. Legs 

 rudimentary, looking something like small 

 stout antennae, tibia and tarsus each nearly 

 as broad as long, femur about lA times as 

 long as broad. All four digitules present 

 though small. Mouth-parts well developed. 

 Hab. On twig of Robinia neofnexicatia^ 

 Soledad Canon, Organ Mts., New Mexico; 

 found by J. E, Owen, a student in the pre- 

 paratory department of the N. M, Agric. 

 College. 



This is another extraordinary species, and 

 should probably fall under Toumeyella, in 

 which case the diagnosis of that group 



