74 BULLETIN 417, U. S. DEPARTMENT OF AGRICULTURE. 



The results obtained show that the larvae prey upon one another 

 to a great extent after the third day, or about the time they enter the 

 second stage. The same is true with the other species of Calosoma 

 thus far studied. However, the writers have fed larvae of 0. syco- 

 pJianta on pupae of Portlietria dispar in this manner to the end of the 

 second stage without suffering heavy losses from cannibalism. Pupae 

 are more desirable than caterpillars for food, as they do not move on 

 the surface of the earth, whereas caterpillars are continually crawling 

 about the sides of the jar, where they are out of reach of the beetle 

 larvae. 



THE PUPA. 



[PI. XVI, A,B, C] 



The average length of three females was 19.2 mm. and the width 

 7.9 mm. The average length of two males was 16.3 mm. and the 

 width 7.9 mm. 



Adults were reared in the laboratory vivarium in 1909 and 1911, 

 and data on the time required to complete the pupal stage were 

 secured each year. Many times the larvae were nob considerate 

 enough to make their cavities at the side or bottom of the glass jars 

 in which they were confined, so that it was difficult to secure exact 

 notes on the time of entering and completing this stage. 



One larva, No. 1506-1, ceased feeding July 12, 1909, and buried 

 itself in the earth for pupation. A female issued July 23. About 

 5 days were passed in the prepupal stage and 13 days as a true pupa. 

 One larva, No. 1506-AC, ceased feeding July 2 and pupated about 

 July 5, but the adult died when emerging, July 17. In this case 3 or 

 4 days were passed in the prepupal stage and 11 or 12 days as a pupa. 

 Other data obtained during those years and in 1911 gave similar 

 results. 



BIBLIOGRAPHY. 



1787. Fabricius, J. C. Mantissa Insectorum, t. 1, 348 p. 



Page 197. Original description of the species under the name of Carabus reticulatus. 



1790. Paykull, G. von. Monographia Caraborum Sveciae, 138 p. 



Pages 67-68. Lengthy description of the species under the name of Carabus reticulatus. 



1801. Fabricius, J. C. Systema Eleutheratorum, t. 1, 506 p. 



Page 213, no. 9. A more detailed description than is given by the same author in 1787, this species 

 being put under the genus Calosoma. 



1804. Latreille, P. A. Histoire Naturelle Generate et Particuliere des Crustaceset 

 des Insectes, t. 8, 411 p. 

 Pages 300-301. Brief comparison of this species with C. inquisitor. 



1810. Gyllenhal, L. Insecta Svecica, t. 1, pt. 2, 660 p. (p. 51, no. 3.) 



1813. Panzer, G. W. F. Fauna Insectorum Germanicae. Pt. I. Eleutherata, 



p. 41. 

 1826. DeJean, le Comte. Species General des Coleopteres, t. 2, 501. 



Page 208. Description comparative with that of C. inquisitor and notes on its occurrence in Europe. 



CALOSOMA ANGULATUM Chev. 



ORIGINAL DESCRIPTION. 



[Translation.] 



So. Calif. Length 27 mm. 



Blackish-blue. Head punctate. Thorax black, angled in the middle, marginate 

 and dark blue on the sides, smooth, punctate at base and apex, with longitudinal line 

 scarcely impressed. Elytra with 14 ribs, interstices latticed, deeply towards the 

 humerus, striate-punctate, with three rows of oblong punctures more marked in the 

 single beetle examined; apex acutely round^ 



