38 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



Habits. — Feeds on Galiwm irvoUugo and Galium verum. Pupates 

 in the ground. 

 Literature. — 



Hexrikskn, K. L. 



1927. ]):uniiark.s Fauna No. 31, p. 341). 



AGELASTICA ALNI Linnaeus'* 



(U. y. Nat. Mils.; described from a mature, probably just molted larva in 

 vial marked " No. 281, from Meinert, 1890. ex Coll. Zool. Mus. Copen- 

 hagen." Probably not reared.) 



Mature larva (fig. 15). — About 11 Uini. long. 



Head shining, dark brown, with lighter colored regions located 

 anteriorly on f rons and around the ocelli ; frontal sutures yellowish ; 

 margins of head capsule and the carina of frons shining black; 

 labruni unicolored dark. Body with dull, darkish skin; shields, 

 sclerites, and legs shining and generally of the same color as the 

 head capsule ; anterior and lateral regions of prothoracic shield more 

 yellowish; a sagittal line on prothorax, mesothorax, metathorax, and 

 the first abdominal segment whitish. 



Setae fine, pointed, rather .short, light colored, and present in 

 small numbers. 



Head capsule (fig. 44). — Eather flat; length of frons and epi- 

 cranial suture about equal; setae rather short and almost white. 



Lahrwn (fig. 44). — With regularly arcuate free margin. 



Majidihle (fig. 55). — With three distinct teeth; tooth No. 1 absent, 

 aiHi the projecting anterior portion of the inner edge not tleveloped 

 as a distinct tooth. Penicillus absent; no setae found. 



Maxilla (fig. 72). — Lacinia carrying about six large, lanceolate 

 setae; galea with rather few, short, and pointed setae, conical 

 appendix short. 



Postlahial hand (fig. 73). — Formed like the letter "W." Labium 

 small ; labial palpi close together. 



Prothorax (fig. 15). — Shield with discal part dark colored, smooth, 

 and flatly convex ; marginal parts light, thick, slightly elevated, and 

 having depressions and pits. Sagittal light line very distinct and 

 complete. Setae arranged in a single row anteriorly, but without 

 order in the rest of the marginal region; two or three small setae on 

 each side in the discal part. Epipleural area small and with a single 

 seta. Prehypopleural area (=episternum) rather bulging and with a 

 single seta; posthypopleural area ( = epimeron) much larger, other- 

 wise similarly bulging and with a .single seta. Eusternal sclerite 

 narrow, transverse, and with several very fine setae. Sternellar 



'• See comments given on p. 40, where Henriksen's description and Boas's figiue of this 

 larva are discussed. 



