REHN AND HEBARD 249 



large series of these species before us shows conckisively, that the 

 present insect is found only in North America southward 

 through northern Mexico on the Gulf coast as far as ^'era Cruz, 

 and also on the island of Bermuda. With no material of the 

 genus from northern Mexico, we are unable to state how far south- 

 ward the ranges of fasciatus fasciatus and fasciatus vicinus 

 extend, though both races occur along the Mexican bound- 

 ary. The single small specimen from Vera Cruz, in the fairly 

 large series of the genus from that region before us, would sug- 

 gest that the species is not found farther south. Study of the 

 Bermudan fauna shows /asc/oius s.s. to be the sole representative 

 of the genus on that island, one male and three females before us 

 not differing at all from typical material of the species. 



Under cinereus and saUator the "frequent misconceptions of the 

 present species are discussed. Normally the form of the lateral 

 lobes of the pronotum in fasciatus s.s. and fasciatus vicinus is 

 particularly distinctive when compared with that of the other 

 American species of the genus. 



Vertex not strongly but distinctly ascending. Fastigium of 

 vertex fully to very slightly more than two-thirds the width of 

 the proximal antennal joint, narrowing with a distinct but very 

 weak concavity to facial suture, when seen from front about one 

 and one-half times as deep as greatest width. Eyes decidedly 

 small. Lateral lobes of pronotum rather narrow, cephalic margin 

 evenly and distinctly convex to the rather broadly rounded 

 ventro-caudal angle,**^ thence weakly but distinctly convex to the 

 distinct humeral sinus; convex callosity moderately broad. Teg- 

 mina always macropterous in typical fasciatus, varying to semi- 

 brachypterous in the western race fasciatus vicinus, in which race 

 this condition is the normal. Male cerci rather short and stout, 

 mesal portion very slightly larger than proximal portion, with a 

 very broad and heavy mesal (vertical) internal tooth which is ])er- 

 pendicular to the shaft of the cercus and directed inter no-mesad 

 with sharp thorn-like apex weakly decurved. In both races of 



"Variation occnirs in which this margin becomes weakly concave before 

 reaching the ventro-caudal angle and, in such si)ecimens, the ventro-cephalic 

 angle is in consequence weakly indicated and the form of the lateral lobes 

 more similar to the general type found in the species of the present subgenus. 



TRANS. AM. ENT. SOC, XLI. 



