CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 395 



emarginate; posterior margin subtruncate; anterior submarginal 

 impressed line distinct from side to side; transverse impression post- 

 median, obsolete; dorsal surface abundantly punctate; lateral sub- 

 margin with about 15 sctigerous punctures. 



Scutellum: Slightly wider than long, triangular, slightly narrowed 

 at apical third where it is less than one-third of membranal suture; 

 apex narrowly rounded; disc punctured. 



Hemelytron: Corial areas poorly defined; membranal suture 



straight, strongly oblique; costa arcuate, explanate, with no setigerous 



punctures; membrane distinctly less than half of hemelytral length. 



Propleuron: Alutaceous, impunctate; prosternal carinae very low; 



anterior margin not lobulate either side of middle. 



Mesopleuron : Faintly concave, evaporatorium extensive, covering 

 most of segment, reaching lateral and posterior margins; posterior 

 margin entire; mesosternum prominent and subcarinate along mid- 

 line, with numerous hairs. 



Metapleuron (fig. 91): Nearly flat, evaporatorium reaching almost 

 to lateral margin; peritreme very long, reaching nearly to lateral 

 margin of evaporative area, formed as an open trough for basal two- 

 thirds, apical third a large, recurving, polished lobe; osteole opening at 

 base of trough. 



Legs: Moderately long; anterior tibia (fig. 121) moderately widened, 

 with seven stout, blunt spines dorsally, not prolonged beyond tarsal 

 insertion; tarsal II shortest; middle and posterior tibiae terete; latter 

 (fig. 143) straight, little more than half as long as body, without spines 

 on posterior face. 



Sternites: Convex, impunctate, alutaceous, dull laterally, shining 

 along broad median area. 



Terminalia: Male genital capsule opening dorsally; gonostylus as 

 figured for species (fig. 196). 



Type of genus. — Macroporus repetitus Ulder (1877, p. 375), 

 monobasic. 



Distribution. — The range of this genus is that of its only included 

 species and appears confined to the western United States, in California 

 (and New Mexico, Torre Bueno, 1939). The specimen (USNM) 

 which Uhler (1876, p. 278) reported from "the vicinity of Baltimore" 

 bears the label "Md." The specimen is of the present species but is 

 undoubtedly mislabeled as no other specimens have been reported from 

 the eastern United States. Therefore, unless supported by additional 

 captures, that record should not be included in the range of the genus. 

 Discussion.— This genus contains a single species, which is treated 

 below. 



