THE GENUS CALOSOMA. 77 



ing ravenously and consumed 48 large larvse of Hyphantria cunea 

 during the next 19 days. 



The records secured are too incomplete to form an accurate idea 

 of the value of this insect as a destroyer of lepidopterous larvae. 

 They indicate, however, that under favorable natural conditions it is 

 an important species. 



HraERNATION. 



Of the small lot of adults received during the fall of 1912 a few after 

 feeding for a period entered the earth for hibernation. The jars were 

 then filled -v^-ith earth and transferred to the laboratory cellar, where 

 the temperature ranged from 40 to 65° F. during the winter, as it was 

 thought that this species could not withstand the severe weather 

 outside. Two pairs were hving when the jars were taken outside in 

 the spring and could be seen in their cavities. One pair of these 

 beetles came to the surface for food September 10 and 23, respect- 

 ively. The other pair was still in cavities in the jar. The male of 

 the latter jar emerged for food August 31, 1914, the female dying in 

 its cavity that summer. 



REPRODUCTION. 



Only one pair of the beetles issued from hibernation in the spring 

 so as to reproduce at the normal time of other species of the genus. 

 The female of this pair issued June 8, 1913 — the male remaining on 

 the surface all winter, as the jar where they hibernated was kept in 

 the cellar. Copulation was observed June 11 and 30. Eggs were 

 removed from the jar June 28 and 29 and July 3 and 4. Eight larvse 

 hatched. The male died July 2 1 and the female during hibernation 

 the following \\4nter. 



DESCRIPTION OF LARVA. 



First stage. — Robust in form, tapering gradually to anal end. Average length of 

 five alcoholic specimens, 8.2 mm.; width, 2.1 mm. Caudal appendages rather long 

 (1.8 mm.), slender, tapering gradually from base to apex, bearing numerous long 

 spines. Dorsal protuberance indistinct in this stage. .Color brownish-black on the 

 dorsum, ventral plates grayish-brown. Anterior ventral plates broad in middle and 

 tapering to a point at each end. 



No second-stage larvse were available for description. 



Third stage. — ^'ery robust in form, broad. Length of one alcoholic specimen that 

 had fed to some extent in this stage, 23.5 mm.; width, 6.5 mm. Caudal appen- 

 dages almost straight, slender, only slightly angled downward beyond dorsal pro- 

 tuberance. Protuberance short, erect, located more than one-half distance from 

 base to tip. Color dull to shining black, ventral plates dark brown. Pronotum 

 nearly square, but rounded on anterior angles. Tergites projecting slightly laterad 

 in partly fed lar\ie, with posterior angles obtuse, except the seventh and eighth 

 abdominal, and pointing slightly backward. Posterior angles of seventh, eighth, 

 and ninth tergites rather acute; angle of ninth very small, not prominent. No 

 reddish-brown patch on dorsum of anal segment. 



NOTES ON LARV/E AND PUP^. 



One female pupa measured 20.5 mm. long and 9 mm. wide. 



Two live third-stage larvaj were received September 4, 1912. One 

 died September 5 without feeding and the other consumed the greater 

 part of a full-grown larva of E.stifjmene acrsea and one of Favilio turnus, 

 and entered trie earth vSeptember 8. A cavity was formed and pupa- 

 tion took place September 12 or 13. The pupa was removed to the 

 top of th(! r-arth for study and although the specimen was not allowed 

 to df'vclop to the adult stage, it was evident that about 14 days are 

 spent as a pupa. 



