50 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



strong spines. Rufo-ferruginous ; antennas, apex of mandibles, legs, apical 

 abdominal segments black; head, dorsulum, and most of second dorsal 

 segment with appressed scarlet pubescence; third to fifth segments with 

 whitish pubescence on the apical margin ; apical margin of first segment, 

 a well-defined circular spot at base of second, apical margin of second 

 (broader in the center) with appressed black pubescence ; legs, venter, 

 and pleurae with erect, pale hairs. 



Type locality: Lucaston, New Jersey, August 27 ( F. 

 Haimbach). 



Type: No. 12913, U. S. National Museum. 



Named after Mr. H. L,. Viereck, who gave helpful sug- 

 gestions about this and the following species. 



Mutilla (sens lat.) zella, new species. 



Female. Belongs to group occidentalis Fox and is very like I'ierecki, 

 but differs as follows : First abdominal segment with uniform, elongate 

 punctures on its dorsal surface, ventrally with a short carina which is 

 notched in the middle; the appressed black pubescence of the second 

 segment at the base is more diffuse, almost forming a broad band, and 

 connected with the apical band by a narrow black line. 



Length, about 10.5 mm. 



Type locality: Wenonah, New Jersey, July 28 iF. Haim- 

 bach). 



Type: No. 12914, U. S. National Museum. 



Thyreopus (Synothyreopus) vierecki, new species. 



Male.- Length 7 mm. Anterior margin of clypeus with a number of 

 small teeth ; distance between the eyes at the clypeus slightly greater 

 than the length of the clypeus; head dulled, finely striato-reticulate ; 

 antenna? simple, third joint slightly longer than fourth ; dorsulum and 

 scutellum longitudinally striated, in some lights striato-punctured ; 

 mesopleurae shining, finely striate, and with some small punctures; 

 metanotum not separated from the posterior face, rugose; metapleunt 

 strongly striated: tibia! shield wider than long, broader at the apex: 

 abdomen shining, almost impunctate. Black : two small spots on the 

 clypeus, most of the scape, two small spots on the pronotum, a band on 

 all the dorsal abdominal segments except the second and third, where 

 they are broadly interrupted, and the legs below the knees yellow : tibial 

 shield brown, streaked with pale. Wings hyaline, slightly dusky, irides- 

 cent ; venation brown. The usual silvery pubescence sparse, the hair 

 rather short, gray. 



Type locality : Da Costa, New Jersey, May 17, 1903 (V. 

 Daecke). 



Type: No. 12910, U. S. National Museum. 



