New Species of Sphecoidea 13 
Family BEMBICIDAE 
Subfamily Stizinae 
Stizus strenuus sp. nov. 
d. Length 9 mm. Head black, with a short, silvery pile and sparse, 
long, silvery hairs; antennae inserted far above the clypeus, the distance 
between the base of the clypeus and the insertion of the antennae much 
greater than the distance between the eye-margin and the insertion of 
the antennae; first joint of flagellum very slightly longer than the second; 
eleventh joint of antennae spinose beneath, the spine slightly curved and 
prominent; joints twelve and thirteen broadly and conspicuously emargi- 
nate beneath, joint thirteen strongly acuminate at the apex; distance be- 
tween the posterior ocelli about equal to the distance between them and 
the nearest eye-margin; frons and vertex with sparse, shallow punctures; 
basal half of mandibles, labrum, clypeus, supraclypeal area, eye-margins 
for about the length of the scape above the insertion of the antennae, 
scape beneath, pedicel beneath, and first joint of flagellum beneath, all 
yellow; twelfth and thirteenth joints of antennae beneath obscure yel- 
lowish. Thorax black, with long, sparse, silvery hairs; prothorax im- 
punctate; mesonotum, scutellum, metanotum and propodeum with sparse, 
shallow punctures; mesepisterna more closely and strongly punctured; 
postero-lateral angles of the propodeum emarginate; spot on the neck, 
band on pronotum interrupted medially, posterior lobes of pronotum, 
spot on tegulae, spot on base of wings, spot on mesonotum just in front 
of tegulae (sometimes almost obsolete), spot at postero-lateral angles of 
mesonotum, spot on mesepisterna above (sometimes lacking), and spot on 
postero-lateral angles of propodeum (sometimes lacking), all yellow. 
Abdomen black, with long, silvery hairs; abdomén with three spines at 
apex as usual; all the tergites (except the first) with a row of long, stiff, 
blackish bristles on the posterior margin; sixth sternite broadly emargi- 
nate medially on the posterior margin; seventh sternite not longitudinally 
carinate medially; band on the first tergite, gradually narrowing towards 
the middle and sometimes interrupted medially, and narrow bands slightly 
wider medially and suddenly widened at the sides on tergites two, three, 
four and five, all whitish. Legs black; spot on anterior coxae beneath, 
apical three fourths of anterior femora beneath and apical third above, tips: 
of intermediate femora above and beneath, all the tibiae except a line 
behind (the line more extended on the posterior tibiae), all the tarsi 
(except a spot on the apical joint of the intermediate tarsi, a line behind 
on the first joint of the posterior tarsi, and the apical joint of the pos- 
terior tarsi), all yellowish. Wings hyaline; the marginal cell much shorter 
than the first submarginal; second submarginal cell not petiolate, but the 
first and second cubital veins meeting on the radial vein. 
9. Length 9 mm. Differs from the male as follows: Antennae entire, 
not spinose or emarginate beneath; the scape beneath, pedicel beneath, 
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