No. 22.] . HYMENOPTERA OF CONNECTICUT. 237 



with black, or thorax mostly reddish ; head and most of abdomen 

 very dark brown ; the latter black at base, blackish beneath ; 

 mandibles castaneous ; palpi stramineous ; antennae mostly brown, 

 dusky apically ; legs stramineous ; wings transparent, tinted with 

 yellowish brown, stigma stramineous, veins darker ; exserted 

 portion of ovipositor about one-fourth the length of the abdo- 

 men; length 3 mm. Male: mouth brown; head mostly black; 

 otherwise as in the female. 



Rockville, 23 August, 1905 (H. L. V.) ; New Haven, 31 Oc- 

 tober, 1903; Putnam, 12 July, 1905 (H. L. V.). 



Hecabolus Curtis. 

 Key to Species. 



1. Predominating color stramineous (female and male) 2 



Predominating color black or blackish. Female: length 1,5 



mm.; face, pleurae, cheeks, and legs dull stramineous; an- 

 tennae pale; wings hyaline; veins and stigma pale fuscous; 

 base and extreme apex of abdomen brownish; ovipositor 

 with its exserted portion about as long as abdomen, 

 sheaths of ovipositor pale, tipped with black minimus 



2. Length 1.5-3 mm. Female: cheeks paler than remainder 



of head, tips of mandibles black, antennae fuscous, pale at 

 base; wings hyaline, iridescent, veins and stigma fuscous, 

 the latter conspicuous; legs, including coxs, stramineous, 

 ovipositor and sheaths stramineous, each tipped with black. 

 Male: head, mesothorax, scutel, and apical margins of 

 second and following abdominal segments blackish or 

 fuscous, mouth-parts dull stramineous; otherwise as in 



female lycti 



Length 2.25 mm. Female: vertex, eyes, mesothorax, and 

 scutel blackish; antennae slightly paler at base and be- 

 neath; wings hyaline, veins and stigma pale fuscous; legs, 

 including coxae, stramineous; tarsal claws black; third 

 dorsal abdominal segment and following segments with a 

 blackish tinge; exserted portion of ovipositor rather longer 

 than abdomen, blackish, basal half pale. Male: face and 

 sides of pleurae dusky; cheeks, pleurae beneath, and pro- 

 podeum dull stramineous; abdomen blackish at apex; other- 

 wise as in female utilis 



°H. minimus Cresson. 

 Parasitic on the larva of Trogoxylon parallelopipedum. 



