AMERICAN MUTILLID^. 249 



% . — Black, with black pubescence, except on abdomen above from mid- 

 dle of second segment, and on ventrals 3 and following at sides, wbere it is 

 reddish ; head with distinct punctures, much narrower than thorax ; punctures 

 of dorsulum coarser than those of head ; middle segment covered with deep, but 

 not very large reticulations ; calcaria black ; first segment coarsely punctured, not 

 very nodose, the sinus between it and segment 2 not deep, ventral carina acutely 

 angular; second dorsal with punctures much finer and closer than on segment 1, 

 the second ventral with large, scattered punctures; wings fuliginous, second sub- 

 marginal cell nearly triangular in consequence of the first and second trans- 

 verso-cubital veins nearly uniting above. Length 14 mm. 



Group pennsylvanica. 



Here we have a group of four species combining the characteris- 

 tics of Spluerophthalma and Photopsis. The eyes are irregularly 

 rounded or reniforni in male, variable in size, rounded in female. 

 Ocelli variable in size, rounded, small in scceva and pennsylvanica, 

 more as in groups haperialis and auripilis. Mandibles heavy and 

 short in male, more or less concave on upper surface, as in groups 

 imperialis and anthophorce, presenting above a scooped-out appear- 

 ance, in the female the mandible is much as in group occidentalis, 

 with an internal tooth before apex First segment of female not 

 quite sessile with the second, but more so than in the preceding 

 group, in the males more or loss nodose. Thorax of female elon- 

 gato pyriform. Tibial spurs not serrated. Marginal cell of a shape 

 between subtruncate and acuminate, two distinct submarginal cells, 

 the third, if present, quite faint. No trace of a pygidium in female. 



It is difficult to draw a line of demarkation between the males of 

 this and the following group. The shape of the ocelli is, as a rule, 

 different in tlie two, but is hardly sufficiently constant to prove of 

 much importance. The only available character between these 

 groups, on which the separation of the two may be based, is the 

 total absence of a pygidium in the female of gvoup pennsylvanica. 



This group formed part of Blake's genus Sphcerophthalma. 



MALES. 



Greater part of body black, with black pubescence, the second segment only 



reddish (ocelli small) SCteva Blake. 



Greater part of body castaueous 2. 



2. Wings fuscous 3. 



Wings subhyaline, darker apically ; pubescence of abdomen griseus. 



jasoii n. sp. 



3. Abdomen from apex of segment 2 black, with black pubescence; ocelli small. 



peiiiisylvaiiica Lep. 



Abdomen entirely castaneous, clothed with golden pubescence; ocelli rather 



large • • aiiripiliN Blake. 



TRANS. AM. KNT. SOC. XXV. (32) FKBRUARY, 1»99. 



