1895.] NATURAL SCIENCES OF PHILADELPHIA. 371 



diverging posteriorly on dorsulum and another near tegulae, lateral 

 spot on scutellum, line on metanotum, spot on mesopleurae, attenu- 

 ated beneath and extending in the form of a narrow lirTe on the 

 anterior part of the mesosternum, then extending down the medial 

 furrow to the medial coxa?, spot on metapleurae and sides of mid- 

 dle segment, legs except spot on coxae and trochanters, a stripe above 

 on femora and an internal spot on fore and medial tibiae, a band on 

 dorsal segments 1-5, narrow medially and greatly expanded at sides, 

 last segment except a narrow, longitudinal, central line, and the 

 ventrals entirely, yellow; flagellum black, testaceous beneath, the 

 first joint yellow basally; wings hyaline, about twice the length of 

 the thorax. Inner eye-margins parallel; apical antennal joints not 

 curved; dorsulum and scutellum rather strongly punctured, the 

 middle segment more coarsely; first joint of fore tarsi a little dilated, 

 but not so much as in speciosa and tuberculata; pulvilli distinct; 

 medial femora not serrate or dentate beneath; first joint of medial 

 tarsi not at all curved; second ventral segment with two rather 

 large, approximate tubercles near posterior margin, seventh 

 apparently smooth; eighth with a discal spine. Length 11 mm. 



Lower Purissima, Lower California (Chas. D. Haines), April, 

 1889. This is the species doubtfully referred by me to mamillata 

 Hdl., in my first paper on Lower California Hymenoptera. There 

 are besides the specimen before me, two others in the collection of 

 the California Academy of Sciences. ■ 



15. Monedula usitata n. sp. 



9 . — Black; inner and posterior orbits, inferior portion of front, 

 spot before anterior ocellus, clypeus except basal half, labrum, 

 mandibles except apex, scape and following two joints beneath, line 

 on pronotum, tubercles in part, two small longitudinal central spots 

 and a line near tegulae on dorsulum, lateral spots on scutellum 

 almost united internally, line on pronotum and a curved one some- 

 times interrupted on middle segment, postero-lateral angles of 

 middle segment and sometimes a spot on sides, femora except apic- 

 ally and tibiae except within and a facia on dorsal abdominal seg- 

 ments 1-5, yellowish, the fasciae on first three segments broadest and 

 deeply emarginate anteriorly in the middle, the others sinuated, 

 second ventral sometimes with a small lateral spot; last dorsal 

 entirely black; antennae dark testaceous above; head and thorax 

 26 



