266 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



115. DASYMUTILLA CHRYSOCOMA, new species 



Female. — Ferruginous ; head wider than the thorax, densely clothed 

 with appressed, golden yellow pubescence, the posterolateral angles 

 sharply carinate; thorax pyriform, clothed above with pale golden 

 pubescence, the disk with a spot of black pubescence; pygidium 

 granular ; length, 13 mm. 



Head ferruginous; mandibles long, a blunt tooth within a little 

 beyond the middle; clypeus divided by a transverse sinuate carina,, 

 that portion of the clypeus anterior to the carina glabrous, impunc- 

 tate; narrow area posterior to the carina closely punctate; clypeal 

 fringe composed of long, pale yellow pubescence; antennal tubercles 

 distinctly separated; scape long, curved, with large, shallow punc- 

 tures above and clothed with sparse, silvery pubescence; first seg- 

 ment of flagellum twice as long as it is wide at the apex, about as 

 long as segments two and three united; antennal scrobes strongly 

 carinate above; front very coarsely, deeply, and confluently punc- 

 tate, the vertex and genae with large, continuous punctures; the 

 front, vertex, and genae densely clothed with appressed, golden yellow 

 pubescence and scattered, erect, pale hairs; postero-lateral angles of 

 the head sharply carinate ; relative widths of head and thorax, 10-8.5. 



Thorax ferruginous, pyriform; dorsum of thorax contiguously,, 

 foveately punctured, the fovea becoming very deep and very large 

 on the ]30sterior face of the propodeum; dorsum sparsely clothed 

 with appressed silvery pubescence and scattered, erect, pale hairs,^ 

 except for a transverse median spot of sparse, appressed, black 

 pubescence; the appressed ,silvery pubescence somewhat denser on 

 the dorsal area of the posterior face of the propodeum; scutellar 

 scale entirely absent; propleura defined anteriorly by a sharp carina 

 extending from the ventral margin to the humeral tubercle; pro- 

 pleura finely closely punctured, with a few large punctures near the 

 anterior margin, clothed with thick, appressed, silvery pubescence; 

 anterior two-thirds of mesopleura finely, closely punctured, clothed 

 with thin, appressed, silvery pubescence; the posterior third with 

 large, contiguous punctures, clothed with thick, appressed, silvery 

 pubescence, and scattered, long, erect, pale hairs; metapleura with 

 a few large punctures ventrally and finely, closely punctured else- 

 where, densely clothed with appressed, silvery pubescence, the punc- 

 turation obscured by the pubescence; sides of propodeum mostly 

 glabrous, impunctate, a few large, indistinct, shallow punctures dorso- 

 posteriorly. 



Abdomen ferruginous ; first tergite deeply foveately punctured 

 posteriorly, the disk with large, shallow, indistinct punctures and an 

 area of fine close punctures along the longitudinal median line, with 

 scattered, long, erect, pale hairs, and a median transverse, apical spot 

 of dense, appressed, silvery pubescence; narrow basal margin of sec- 



