CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 397 



description, "in the vicinity of Baltimore," is undoubtedly in error, 

 probably resulting from mislabeling, as the specimen is still in the 

 Uhler collection (USNM). No subsequent specimen has been 

 labeled for the eastern United States. 



Specimens studied. — 28 males, 49 females. 



United States: California: Camp Baldy, Carmel, Greenhorn Mts. in Tulare 

 Co., Independence, Monterey, Mt. Diablo, Mt. Wilson, Paraiso Springs, Pin- 

 nacles National Monument, Riverside Co., San Diego Co., San Francisco, San 

 Jacinto Mts., Sequoia National Park, Suisun, Tan Bark Flat, Yuba City; October 

 to June. 



Discussion. — Ecological data on specimens consisted of the phrase 

 "in soil" on a series consisting of one adult and three young instars, 

 and one note of "Ceanothus." Torre Bueno (1939) listed the species 

 from New Mexico. 



Genus Microporus Uhler 



Microporus Uliler, 1872, p. 394 (name only) ; 1876, p. 275. 



Diagnosis. — The very strongly restricted metapleural evapora- 

 torium that just outlines the peritreme marks this genus as distinct 

 from the others in the Western Hemisphere. 



Description: — Small, 3.5-5.2, broadly roundly oval, greatest width 

 slightly posterior to midlength; dorsum moderately, venter strongly 

 convex. 



Head: Length about three-fourths width; oblique, slightly to 

 decidedly convex above ; clypeus almost or quite as long as juga, both 

 with fine marginal carina dorsally and a sunken submarginal line 

 with coarse contiguous setigerous punctures bearing short blunt pegs 

 and several long hairs; eyes well developed but small, projecting; 

 ocelli well developed, moderate in size, separated from eyes by space 

 distinctly more than the transverse ocellar width; antennae 5-seg- 

 mented, IV and V subequal in length, stoutest; bucculae low, reaching 

 almost to base of head ; labium almost or quite reaching middle coxae, 

 II longest, weakly compressed, without semicircular foliaceous lobe, 

 I and III subequal, longer than IV. 



Pronotum: Almost half as long as wide; side margins carinate, 

 narrowing from base, basal half or more straight, with a submarginal 

 row of six or seven or a submarginal band of numerous setigerous 

 punctures; anterior margm moderately, simply emarginate; posterior 

 margm broadly, weakly convex; angles rounded. 



Scutellum: As wide as or slightly wider than long, triangular, apex 

 broadly rounded, not or very feebly narrowed; apex about two-thirds 

 of membranal suture ; disc abundantly punctured. 



Hemelytron : Corial areas well defined, moderately punctured over 

 entire surface; costa with 20 or more setigerous punctures; membranal 



