No. 22.] HYMENOPTERA OF CONNECTICUT. 279 



and yellow in color; wings practically colorless, stigma 

 and veins brownish. Length 3.5-4 mm luteipes 



5. Thorax marked with brownish above, or only partly brown- 



ish above 6 



Thorax unicolorous and brownish stramineous 7 



6. Female: 4.7 mm. long; exserted portion of ovipositor a lit- 



tle longer than second dorsal abdominal segment; head 

 and antennae, except ocellar region, which is black, mostly 

 stramineous and brownish stramineous; thorax brownish, 

 except dorsulum and propodeum, which are blackish; tegu- 

 lae, base of wings, legs, including coxae, greater part of 

 apical two-thirds of second dorsal abdominal segment 

 and all of third dorsal abdominal segment, except apical 

 margin of latter (which is blackish), yellow; dorsal ab- 

 dominal segments beyond third brownish and brownish 

 stramineous, petiole of abdomen mostly brownish stramin- 

 eous; wings colorless, except stigma and veins, which are 



brownish; hind tibiae with brownish tips americanus 



Species not answering description of americanus as given 

 above, in all particulars 8 



7. Male: head mostly concolorous with thorax, antennae mostly 



brownish; legs almost entirely yellow-stramineous; abdo- 

 men mostly brown, its apical dorsal half blackish; wings 

 faintly tinged with brown; stigma and veins brownish. 



Length 4.5 mm melleus 



Female: head and antennae as in melleus; legs as in last-men* 

 tioned species, except hind tibiae, which have apical fourth 

 brown; size of body approximately as in melleus; abdomen 

 with its dorsum mostly yellow, faintly tinted with brown, 

 and its dorsal segments more or less margined with brown; 

 ventral portion of abdomen brownish; wings as in melleus as 

 described above; ovipositor nearly as long as first dorsal 

 abdominal segment obliquus 



8. About 2.5 mm. long; almost entirely yellowish stramineous, 



with the following exceptions: ocellar region and eyes 

 black or blackish; dorsum of thorax partly brownish; dor- 

 sum of abdomen (except second and third dorsal segments, 

 which are mostly yellow) mostly blackish or brownish; 

 hind femora at apex and hind tarsi (partly) more or less 



brownish scitulus 



Species related to scitulus, but answering the following de- 

 scription, at least in female: length 2.3-3 mm.; ovipositor 

 exserted, pale honey-yellow or yellowish white, disk of dor- 

 sulum and propodeum reddish brown, the latter in some in- * 

 dividuals black; tips of mandibles black; abdomen black, 

 but with a luteous spot occupying most of second and third 

 dorsal segments; a spot at base of hind tibiae, and apex of 



