414 KXTOMOLOuir VT. SOCIETY 



at sonic length concerning his observations on the lite-history of 

 ^his insect and its natural enemies. He has reared no true para 

 sites in Maryland, although Syrphus flies were abundant early in 

 the season and Cocci nellida* late in the season, lie stated tha* 

 he is at a loss to predict with confidence concerning the abundance 

 of this destructive pea enemy the coming season. 

 Mr. Dyar then read the following paper : 



LIFE HISTORY OF CALLIDAPTERYX DRYOPTERATA GRT. 

 By HARRISON G. DYAR. 



Not long ago 1 published a general account of the mature struc 

 ture of this larva (Can. ent.. xxx, 155). the first larva of the Epi- 

 plemid* discovered in America. Last season I found the SJHV i - 

 near Washington, and was able to observe all the stages. Some 

 unexpected points appeared. The Epiplemidjv are nearly allied 

 to the Cieometrida?. yet these larva* would be taken for little Noc- 

 tuids The eggs, too, are of the vertical type, distinctly ribbed. 

 and not at all suggesting lioometrida? or Orepanida\ The larv;v 

 are exposed feeders and gregarious. Evidently the Epiplemida- 

 have pursued as lar\\r their own course of specialization, distinct 

 from the allied tamilu - 



Laid in a batch of 25 or more on the back of a leaf. Conical, but 

 with a rounded top, nearly flat : base flat ; micropylar area a little elevated. 

 circular, finely reticulated : around this is an area, covering the re- 

 the top surface, coarsely reticulate, the cell areas strongly sunken: sidec 

 finely ridged, 40 or over, the ridges not decreasing in number except iust 

 at the top. the spaces between divided into quadrangular areas by flne 

 cross striae; diameter, .5 mm. On hatching, the larva? cut oft* a cap at the 

 vertex, which is left intact with the rest of the shell. Shells very thin, so 

 that some collapse: white. 



v .-^r 7. Head rounded, bilobed, colorless; eve black, mouth brown: 

 width, .25 mm. Rody colorless, food green. The shape is a trace flat 

 tened, both joints n and i: enlarged at the sides, the anal plate small and 

 not colored, though bristly with seta*. Cervical shield likewise rather 

 hairv. though only the primary hairs are present. Segments :: -annulate: 

 tubercles small, slightly conic, faintly blackish. Seta? simple, colorless. 

 rather long. Tubercles iv and v well separated. Feet normal, perfectly 

 equal, slender. 



vV/rjjY //. Head as in the next stage, but the tubercles all distinctly 

 duskv : width, .3 mm. The larva is squarish, a little flattened, joints 11 

 and 12 a little enlarged at the sides: no shields: seta> pale. The larva" 

 feed ^sed and are active, running about over the stems for new 



leaves. At tii> as, later scattering, but remaining on the same 



plant. They eat the parenchyma from below in irregular patches till - 

 V, then the whole leaf. 



