No. 22.] HYMENOPTERA OF CONNECTICUT. 225 



Length 4 mm; black; head pale yellowish red; occiput and a 

 spot enclosing ocelli black; antennae entirely black; legs 

 dull reddish, coxae black, tips of hind tibiae and more or 

 less of hind tarsi dusky; wings faintly dusky, veins and 

 stigma fuscous; abdomen rufo-piceous sculptus 



E. mellipes Cresson. Peristenus mellipes Ashmead. 

 West Haven, 27 June, 1905 (H. L. V.). 

 E. sculptus Cresson. Dinocampus sculptus Ashmead. 

 Parasitic on the adult of Megilla fuscilabris. 



Dinocampus Foerster. 



*D. pyri Viereck (new species). 

 Length 3 mm. ; head brownish stramineous, except face, 

 which is yellowish ; antennae dark brown, scape, however, brown- 

 ish stramineous in front; thorax black or blackish, prothorax 

 brownish ; tegulse brownish, costa brown, stigma, radius, and 

 greater part of transverse cubitus brownish stramineous, remain- 

 ing veins pale, membrane of wings clear; propodeum rugose, 

 with a short, median, longitudinal raised line on its basal fourth ; 

 in addition to this there is an imperfect areola, which is conflu- 

 ent with an equally imperfect petiolarea ; legs stramineous, tinted 

 with brown, apical tarsal joint and claws dark brown; petiole of 

 abdomen black or blackish, color of the rest of the abdomen 

 merging from blackish to brownish stramineous, exserted portion 

 of ovipositor nearly half the length of the abdomen. 



Type locality : New Haven, collected 26 May, 1904, on flowers 

 of the chokeberry (Pyrus arbutifolia) (H. L. V.). 



D. americanus Riley. 



Length 3.5 mm.; black; antennae dark, pedicel and first joint 

 of flagel sometimes yellowish; head mostly fulvous; mid and 

 hind coxse black, remainder of legs mostly stramineous; wings 

 hyaline, stigma dark brown, veins somewhat lighter; abdomen 

 mostly dark fulvous to castaneous. 



This species is parasitic upon the adults of two beneficial 

 lady-bird beetles, namely, Megilla fuscilabris (M. maculata), the 

 food of which includes pollen, fungus spores, plant lice, and 

 other soft insects, and Coccinella novemnotata, the species 

 reputed to be the most general feeder on plant lice of all kinds. 



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