BEMBIDIIN/E 203 



The species above described as pumilus Dej., fits the meagre 

 description very well, especially in the darker opalescent posterior 

 cloud on the elytra, which is also alluded to by Chaudoir as a dis- 

 tinctive feature; but its locality is rather remote from Louisiana, 

 this being of but little moment however, as no locality for pumilus 

 is given by Dejean, and it may just as well have been Florida as 

 Louisiana. Appalachius, because of the much larger head and pro- 

 thorax, is in al] probability a species distinct from cuneatus, but, 

 as it is represented only by a single individual, it may be left in 

 subordinate rank for the present. 



The two Panama species included above, seem to be different 

 from anything described by Motschulsky; beaumonti resembles 

 flaincollis in some respects, but the elytral cloud is sutural in the 

 latter, and the length and width as given by the author are very 

 much less, being 1.5 by 0.6 mm. The author also states that in 

 flavicollis the frontal sulci approach each other anteriorly. 



The species allied to proximus and scitulus have been somewhat 

 misunderstood and confused in nearly all collections, but they are 

 really well differentiated. For example, proximus itself is an iso- 

 lated species, not closely related to any other by reason of its regu- 

 larly oval and very elongate elytra, larger size, notably convex 

 surface and by the central elytral blackish plaga not attaining the 

 sides, and therefore not having the form of a fascia as it has in 

 scitulus. Nubifer has an identical coloration and form of the cen- 

 tral plaga, but the elytra differ very much, being shorter and broader 

 and the prothorax is relatively much larger. Scitulus, pallescens 

 and hyalinus are allied species, forming a coherent group of a differ- 

 ent type from proximus, having an elytral cloud-like fascia from 

 side to side, becoming almost obsolete in hyalinus; this and palles- 

 cens differ from scitulus in the more widely separated frontal sulci, 

 much larger and more prominent eyes and more pallid general col- 

 oration; scitulus is confined to the Atlantic slope of the Appa- 

 lachians, pallescens to the Mississippi Valley and hyalinus to cen- 

 tral Texas, so far as now known. Rhodeanus is a remarkably dis- 

 tinct species in its small head, with flattened eyes and relatively 

 large prothorax, having the sides of the base transverse and not 

 oblique as in all the other species, and in the sharp right basal 

 angles. Temporalis is also well differentiated by its very ventri- 



