THE GENUS CALOSOMA. 119 



August 18, 22 second-stage larvae were left inside the tin circle. One 

 larva was placed upon the bark and climbed slowly, then rested for a 

 time in a crevice, later resuming its journey upward, and finally 

 succeeded in reaching the cage at the top of the tree. This larva also 

 climbed out 6 inches on a small twig. During the night of August 21 

 one of the larvae climbed to the food cage on top of the tree, ate part 

 of a gipsy-moth pupa, and descended to the base before 8 a. m., 

 August 22. In this particular case it was impossible to determine 

 whether a second or third stage larva had entered, as one specimen 

 had transformed to the latter stage. 



From August 22 to September 4, third-stage larvae were placed in 

 the circle about the tree. On the afternoon of August 24 one third- 

 stage larva was found feeding in the food cage at the top. On 

 August 30 two different third-stage larvae were liberated in the 

 circle and later one of these was placed upon the tree, on which it 

 continued to climb at intervals until it reached the food cage. On 

 September 1 one third-stage larva was found in the food cage. It 

 had eaten one pupa of Plusia hrassicx and one caterpillar of HyiyJian- 

 tria cuneq. 



The larvae of this species climb to some extent in all stages. The 

 experiments indicate that the large larvae climb the best. 



PUPA. 



The average length of the female pupa is 19.6 mm. and the width 

 8.1 mm.; the male pupa averages 17.5 mm. in length and 8 mm. in 

 width. 



Based on data secured from four specimens, an average of 13.5 

 days was passed in this stage. 



CALOSOMA DISCORS Lee. 



ORIGINAL DESCRIPTION. 



Wingless, less elongate, black, thorax short, quite intricately rugose, with sides 

 quite rounded, margin somewhat depressed, base emarginate, broader than long at 

 middle, elytra oval, slightly broader than the thorax, densely substriate with striae 

 and interstices bearing a row of punctures, and with, three rows of impressed indis- 

 tinct dots. 



Length 0.75 to 0.82. [PI. I, fig. 9.] 



LeConte * adds the following to this description: 



San Fran. Mr. Child; Sacramento, Mr. J. Wittick. This species by its short, robust 

 form, and by the absence of wings, simulates Callisthenes, but the antennae are as in 

 other species of Cal. 



Body black, without metallic lustre. Head elongated, rough, with confluent 

 wrinkles and punctures; antennae with the third joint strongly compressed twice as 

 long as the fourth, fifth and following joints entirely pubescent.* Thorax more than 

 twice as wide as the head, and fully twice as wide as its length, not convex, margined, 

 with the sides somewhat depressed behind, but not reflexed; base transversely im- 

 pressed, and faintly bifoveate; middle part truncate, posterior angles moderately 

 produced, hardly acute at apex. Elytra oval, moderately convex, a little wider than 

 the thorax, marked with faint approximate striae, which are strongly punctured; the 

 narrow interstices are also marked each with a row of punctures equal to those of 

 the striae; in certain lights three rows of very indistinct foveae may be seen in the usual 

 position. 



This species has also been reported from Washington and many 

 localities in California. 



1 LeConte, J. L. Report upon insects collected on the Survey. (Reports of explorations and surveys 

 to ascertain the most practicable and economical route for a railroad from the Mississippi River to the 

 Pacific Ocean. Made under the direction of the Secretary of War in 1853-1855. Supplement to v. 1. Zo- 

 ological report no. 1.) 72 p., 2 pi. (p. 31, pi. 1, fig. 9). 1857. 



