No. 22.] HYMENOPTERA OF CONNECTICUT. 137 



Pontania Costa. 

 Key to Species. 



1. Head, including orbits, black 2 



Head with orbits resinous or ferruginous 5 



2. Thorax with collar and tegulse black; body black, with tro- 



chanters, apical half of femora, tibise, and tarsi, pallid; 

 clypeus nearly truncate; antennae with third segment dis- 

 tinctly shorter than fourth; saw-guides slender, tapering, 



rounded at tip. Length 4 mm atra 



Thorax with tegulse and collar narrowly pale 3 



3. Clypeus very slightly concave, almost truncate; body black, 



with tip of the clypeus, labrum, mouth-parts, extreme angles 

 of pronotum, teguls, and legs except bases of coxee, yellow; 

 antennae with third and fourth segments subequal; saw- 

 guides elongate, narrow, tapering regularly to tip. 



Length 4 mm hyalina 



Clypeus emarginate 4 



4. Head smooth, not coarsely punctate; body black, with ape.x 



of clypeus, other mouth-parts, angles of pronotum, tegulce, 

 and legs for the most part, yellow; antennse with third 

 segment slightly longer than fourth; saw-guides narrow, 

 regularly tapering or slightly emarginate on lower edge. 



Length 4 mm terminalis 



Head roughened and coarsely punctate; body black, with 

 clypeus, mouth-parts, angles of pronotum, tegulse, hypo- 

 pygium, and legs except bases of coxae, yellowish ferruginous; 

 antennas with segments three and four subequal; hypopygium 

 narrow, rounded at tip. Length 4 mm rugulosa 



5. Head with the frontal crest obsolete 6 



Head with the frontal crest present 7 



6. Claws coarsely notched; body resinous yellow, with antennae 



above, quadrate spot on vertex, quadrate spot on meso- 

 notum, line down center and tip of scutellum, and dorsum 

 of abdomen except the lateral margin, brownish black; 

 antennse with the third segment a little shorter than the fourth ; 

 saw-guides short, broad, rounded at tip, emarginate be- 

 neath. Length 4.5 mm robusta 



Claws very minutely cleft at extreme tip; body yellowish 

 ferruginous, with antennas, a large spot on head about the ocelli, 

 occiput, mesonotum and metanotum, abdomen except nar- 

 row lateral margin, more or less of metaepisternum, and 

 bases of posterior coxae, black; procidentia not or scarcely 

 projecting. Length 4.5 mm placenta 



7. Head with frontal crest unbroken, not even slightly notched 8 

 Head with frontal crest broken or notched 12 



