368 Description of Lcpilopterous LarvcB. 



e cceediugly slender and minute, white, and concealed by tlie fleshy en- 

 velope. Mouth parts chesnut brown ; head light green, entirely con- 

 cealed by the hood. Length -^, breadth of under part f , height at mid- 

 dle, /g inch. Sept. 20, 1873, and Sept. 24, 1875. Burr oak and 

 Tartarean honeysuckle. Master Ernest Baker. Two specimens. 



Remarks. This is by far the most remarkable insect of the group 

 that I have yet seen, not only on account of its odd and nonde.'^cript 

 form, but on account of the habit it has of remaining fixed to one leaf, 

 until it is devoured, down to the very least amount of space upon which 

 the insect can make its footing secure. When full fed, and before 

 leaving the food-plant, no segments are visible, the caterpillar some- 

 what resembling one of the large, triangular leaf-hoppers, Psyllidce. 

 When turned upon its back, the boundaries of the lower surface, or 

 edges of the lateral surfaces, give the insect the appearance of being 

 enclosed in a shell. 



When, however, the fluid is ejected, previous to the formation of the 

 cocoon, and the larva shrinks as before mentioned, the segments be- 

 come distinctly visible. The specimen captured this season, spun its 

 cocoon Oct. 2d, 1875. The cocoon is not so dense as that of the other 

 species described, and is of a lighter color. The insect must besought 

 on the under side of the leaf, and is evidently very rare, but two speci- 

 mens having come under my notice in three years. 



Number five. Larva of CallocMora cMoris, H-Schaefier. Larva 

 flattened above and at the sides, with two dorsal and two lateral keels, 

 ornamented Avith densly spinulated tubercles, there being nine on each 

 lateral keel, and six on each doi'sal keel. Of the latter, the front pair 

 is shorter than the others. Between the dorsal keels are four, nar- 

 row, purple, longitudinal lines, between which are three narrow white 

 lines, the latter sometimes tinted slightly with pink. Similar lines 

 extend along the lateral surfaces, between the dorsal and lateral keels, 

 and below the latter. Head and mouth parts chestnut brown, concealed 

 beneath the hood, but not so entirely as in the other species of this 

 genus, except when feeding. Thoracic legs white and minute. Gen- 

 eral colors rose and orange, the middle third of the dorsal keels and 

 their spines being brilliant rose color, or light crimson, and the rest 

 bright orange. A variety, or a species so closely allied, as to show no 

 difference but in color, has the spines lemon j^ellow, and the general 

 surface lighter than the specimens here described. Food-plants, Tar- 

 tarean honeysuckle, pear, oak, cherry &c. From September 3d, to 

 October. Many specimens. 



Remarks. This beautiful insect, by far the most common of the 

 family, is a conspicuous object, from the contrast of its lively colors 



