98 OHIO BIOLOGICAL SURVEY 



Sphecomyia Latreille 



107 S. vittata Wiedemann. One male, one female, West Jefferson; 

 mid-Ma}" and early June. (Figs. 236, 239.) 



Temnostoma vSt. Fargeaii and Serville 



1 Abdomen with three or four } ellow poUinose cross-bands of nearly equal 



width bombylans 



Abdomen of female has only three yellow pollinose cross-bands; the wings 



brown in front, this color not extending behind the fourth longitudinal vein; 



otherwise close to bojnhvlans *trifasciaia Robertson ( 111. ) 



Abdomen broadly oval, with more than four cross-bands, of unequal width. . 2 



2 The thorax has, in addition to the other spots, two on each side made by the 



interruption of the sutural stripe 4 



The thorax has, in addition to the other spots, only one elongate spot on each 

 side; femora mostly yellow; distal part of abdomen with broad yellow and 

 very narrow black cross-bands 3 



3 Scutellum except the base, densely yellow pollinose pictulum 



Sculletum, except the base, shining metallic excentricum 



4 Second segment of abdomen with a broad anterior cross-band, distal segments 



with three transverse black spots alternans 



Second segment without anterior cross-band, distal segments with a broad 



interrupted black cross-band; pile of scutellum black 



*ve}iiista Willst. (Lake Superior, Mass., N. H ) 



108 T. alternans Loew. Seven .specimens, Ira, Medina; June 10 to 

 August 15. 



109 T. bombylans Fabricius. Six males and two females, Ira, 

 Cohim1)us, Cincinnati; mid-May to mid-June. 



no T. excentrica Harris. Seven specimens, Ira, Cinciiuiati; June. 



(Fig. 235.) 



Ill T. pictula Williston. Four .specimens, Cincinnati; early Jtme. 



Ceria Fabricitis {Ceriodcs) 



Antennal process almost wholly wanting, first joint of antennae very slen- 

 iler, nearly as long as the two following together; face vertical not at all excavated in 

 profile; second segment of the abdomen much constricted, third and fourth seg- 

 ments each with two arcuated spots willistoni 



Antennal process slender, longer than first joint of antennae; second to foiirtli 

 abdominal segments without yellow spots in addition to bands of hind margin; 

 second segment much shorter than the third; third longitudinal vein bent deeply into 

 first posterior cell abbreviata 



