November 1S91. 



PSYCHE. 



173 



THE EARLY STAGES OF THREE COLEOPTERA. 



BY SAMUEL H. SCUDDER. 



Finding among some old papers 

 notes of the early stages of certain Col- 

 eoptera imperfectly known, I venture to 

 print them. All the species were 

 found upon sweet fern. 



MEGILLA MACULATA. 



The full grown larva has the head shining 

 black, faint yellowish in centre. Body black 

 above, brown beneath, except two yellow 

 spots on the edge of the fifth abdominal seg- 

 ment; first thoracic segment with transverse 

 yellow bands at front and hind edges; the 

 second and third with a yellow dorsal stripe; 

 second abdominal segment, except the mid- 

 dle third, yellow, fifth abdominal wholly 

 yellow, and the other segments with a row 

 of yellow spots on each side. Besides there 

 are twelve longitudinal series of black pa- 

 pillae, six on the upper and six on the under 

 surface, one to a segment in each series, 

 those on upper larger than those on under 

 surface, each giving rise to a short black 

 hair. 



The pupa is in general black. Head with 

 a median yellow line. Thorax with a dorsal 

 yellow stripe, a median transverse band and 

 a stripe at the sides reddish yellow ; from 

 these a dorsal and lateral stripe of the same 

 color pass backward and broaden in the mid- 

 dle of each segment, the first abdominal seg- 

 ment thus entirely reddish yellow except a 

 subdorsal black spot on either side; besides 

 in the interstices of the abdominal segments 

 are other minute yellow and black spots ; the 

 thoracic appendages are black and the mark- 

 ings of the elytra of the future imago cannot 

 be seen ; ventral surface of abdominal seg- 

 ments white. 



The hind legs protrude oddly on 



either side of the body beneath the 

 elytra like two side horns, and the legs 

 of the cast larval skin sprawl about the 

 tail of the chrysalis, the last segment 

 being immersed therein. When quiet, 

 the chrysalis lies on the surface of rest, 

 but if disturbed, it erects its whole body 

 at right angles thereto, and then the 

 interstitial markings of the abdomen are 

 concealed. One individual changed to 

 chrysalis on August 24. (Notes of 

 1S59.) 



COCCINELI.A SANGUINEA. 



The full grown larva has a small black 

 head and a dusky body; in the middle of 

 either side of each thoracic segment is a 

 large black spot, covering nearly the whole 

 surface on the first segment which is bor- 

 dered anteriorly with dull orange; there is a 

 dull orange dorsal band of irregular width 

 along the whole body, its limits vague, and 

 besides, on the abdominal segments, subdor- 

 sal, lateral and stigmatal series of black spots, 

 one to each segment; on the sides of the 

 first five abdominal segments are found some 

 dull orange spots; the body beneath is dusky 

 with a rather dull orange broad ventral band \ 

 the legs are black. Length 9 mm. 



The pupa is in general of a dusky yellow; 

 the head is black; thorax with a yellowish 

 dorsal line and on either side of it at the 

 posterior edge of each segment a black spot; 

 the first thoracic segment has also another 

 lateral black spot on posterior edge and a 

 large black spot on the front edge ; the wings 

 and all the thoracic appendages are black 

 where exposed; but otherwise apparently 

 dusky or pale yellow; the abdominal seg- 



