AMERICAN HYMENOPTERA. 319 



obsolete. Thorax broadly oval, pronotum finely rugosely punctured, subtrans- 

 verse in front, the humeri broadly rounded ; mesonotum closely and deeply 

 punctured, the grooves vanishing on their forward fourth, scutellum coarsely 

 metanotum rather finely reticulate overall ; mesopleurse contiguously punctured, 

 mesostern u m simple. Abdomen short, the first segment broader than long, very 

 broadly sessile with the second, finely punctulate, second segment moderately 

 punctured overall, remaining segments minutely closely punctulate and provided 

 with rather denser simple hairs. Venter of abdomen punctured as above. 

 Legs short, femora and tibite more or less castaneous, tibial spurs dull testaceous. 

 Wings hyaline, veins testaceous, clearly cut, stigma castaneous, marginal cell 

 short and broad, second submarginal short, receiving its recurrent nervure at the 

 basal third, an extremely faint indication of a short third submarginal can be seen. 

 Length, 7 mm. 



Fig. 46 ; occiput. 



One male. Texas. The part of the State is not indicated. From 

 the collection of the Museum of Comparative Zoology, Cambridge, 

 Massachusetts. 



This species is near hyalina Blake, but differs in the stronger 

 punctuation of the abdomen and in the lack of the third submar- 

 ginal cell. 



Females. 



The addition of a number of species makes the following modi 

 fication of the table on page 261 of service. The edentate specimen 

 of simillima has been included, as the previous tables would lead it 

 to this place. 



Insect more or less clothed with appressed pubescence in addition to longer erect 



hairs. 2 



Insect with no appressed pubescence, with erect hairs only 6, etc. 



2. First flagellar joint subequal to second and to scape 2a. 



First flagellar joint longer than second or scape 3. 



2a. Second dorsal with appressed and erect pubescence 2b. 



Second dorsal with erect hairs only hy permnestra Fox. 



2b. Head and thorax rugosopunctate, the thorax coarser than the head ; thorax 



rounded ; abdomen not ornate 2c. 



Head and thorax finely punctured, the thorax finer than the head ; sides of 

 metathorax sharp, thorax quadrate ; second dorsal with two rounded 



patches of white hairs aprica sp. n. 



2c. Mandibles short, bidentate at tip ; pubescence long ; pygidiuru less prominent ; 



humeri dentate venenaria sp. n. 



Mandibles edentate but with a basal tubercle on outer side ; pygidium dis- 

 tinctly margined 2d. 



2d. Pygidium with fine, deep, longitudinal strise ; pubescence short ; apical half 



of abdomen blackish ; humeri rounded i ill par sp. n. 



Pygidium faintly granular; insect ferruginous; pubescence moderately long ; 

 humeri dentate penaga sp. n. 



TBANS. AM. ENT. SOC, XXIX. OCTOBEB, 1903 



