ART. 2 BEETLE LARVAE OF GALERUCINAE — BOVINQ 25 



sternellar sclerites almost fused into one plate, very thinly chitinized, 

 and rather easily overlooked ; two or three setae on each side. 



Mesothorax and metathorax (fig. 24). — Prescutum with compound 

 interior sclerite carrying two setae on each side; exterior sclerite 

 distinct, with one seta. Scuto-scutellum with compound interior 

 sclerite carrying two setae on each side; exterior sclerite large, dis- 

 tinct, and with three setae. Alar area with a large, distinct sclerite, 

 carrying three setae. Spiracular area chitinized, with three setae. 

 Epipleural sclerite carrying one seta. Prehypopleural and post- 

 hj^popleural sclerites as in prothorax. Eusternal compound sclerite 

 with two setae on each side. Sternellar sclerite minute, and with 

 one seta. 



First to seventh dbdonninal segments (fig. 24). — The skin between 

 (he sclerites well developed, the sclerites of moderate size. Prescutum 

 with compound interior sclerite bearing three setae on each side; 

 exterior sclerite distinct, and with one seta. Scuto-scutellum with 

 compound interior sclerite bearing one seta on each side; exterior 

 sclerite distinct, rather large, and bearing three setae. Parascutal 

 area without anterior sclerite, without chitinization around the 

 spiracle and with only posterior sclerite present, carrying two setae. 

 Epipleural sclerite round, somewhat projecting, with three or four 

 setae. Hypopleural sclerite small, with two setae. Eusternal com- 

 pound sclerite with two setae on each side. Sternellar area with a 

 small sclerite, carrying two setae. 



Eighth abdominal segment. — Similar to preceding segments, but 

 with the interior and the exterior scuto-scutellar sclerites fused into 

 a single plate, carrying three setae on each side. 



Ninth abdominal segment. — Pygidial shield small, semicircular, 

 half as wide as eighth abdominal segment ; five setae on each side in 

 the free margin and two or three on each side of the disk. Ventral 

 side with a transverse, band-shaped, unpaired sclerite; three setae 

 on each side. 



Tenth abdominal segment. — With one small unpaired posterior 

 anal lobe, one small unpaired anterior anal lobe, and one large lateral 

 anal lobe on each side. 



First and second larval instars. — Mandibles and other mouth parts 

 shaped as in mature larva; thoracic and abdominal sclerites also 

 present in the same number, arranged in the same way, and carrying 

 as many setae as in the mature larva; likewise possessing capitate 

 setae. 



Habits. — Feeding on leaves of Ewpatorium. perfoliatwn. Trans- 

 forms to pupa in an oval cocoon formed by an open network of 

 filaments, attached to a leaf. 



