230 WILLIAM J. FOX. 



Pennsylvania : Pliiladelphia ; New Jersey : Gloucester County ; 

 Florida: Jacksonville. Four specimens collected by C. W. Johnson. 



5. Group asopus. 



Differs from group ivaco in the fully-developed Avings of male, 

 which sex only is known. The marginal cell is broadly truncate, 

 as in group occidentalis, and two distinct submarginal cells with 

 faint traces of a third are present. Second ventral segment with a 

 median carina terminating in a tooth. 



MALES. 



Head and thorax more or less red, with reddish or fulvous pubescence above- • .2. 

 Head and thorax black, with entirely black pubescence (that of segments 3 and 



following black) bexar Blake. 



2. Segments 3 and following with black pubescence asopus Cress. 



Segments 3 and following above with pale fulvous pubescence- -hector Blake- 



27. Mill ilia asopus Cress. 



Mntilla anopus Cresson, Proc. Ent. Soc. Phila., iv, 435, % , 1865. 

 fyphserophthalma asopus Blake, Tr. Am. Ent. Soc, xiii. 225, % , 1886 



Colorado. Blake suggests that either this species or hector is the 

 male of (legina, which is not likely, inasmuch as cegina belongs to a 

 different section of the genus, having bidentate mandibles. 



28. JVIiitilla hei'tor Blake. 



Mntilla { Sphserophthnlma) hector Blake, Tr. Am. Ent. Soc, iii, 237, % , 1871. 

 Sphxrophthalma hector Elake, ibid, xiii, 225, % , 1886. 

 Kansas. Probably represents a variety of asopus. 



29. Mutilla be.'sar Blake. 



Miitilln (Sphxrophfhnlmn) hexar Blake, Tr. Am. Ent. Soc, iii, 238, %, 1871. 

 Sphxrophthfdma hexar Blake, ibid, xiii, 229, % , 1886. 



Texas. These three species (?) may be but forms of one variable 

 species. 



6. Group occidentalis. 



Eyes round or irregularly ovate, smooth, not facetted, entire in 

 both sexes. Mandibles not emarginate, either with a tooth within 

 near apex, or falcate (edentate) in the females. Abdominal segment 

 of female usually narrower at apex than base of second, but is not 

 strongly nodo.se. Thorax of female varying from pyriform to hexa- 

 gonal. Tibial spurs of female more or less serrated. Marginal cell 

 truncate, the number of submarginals varying from two to three, 

 usually with three. 



The species of this large group represent niost of those included by 



