406 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



Metapleuron : Osteolar peritreme reaching half way across segment, 

 termmal process variable (fig. 90, b-d), curved into small auricle with 

 osteole opening ventrally at base ; anteroapical angle prolonged along 

 mesosternal suture as evanescent projection; lateral area polished, 

 with a number of obsolete to strong punctures. 



Legs: As in generic description. 



Terminalia: Genital capsule distinctly punctate laterally, margin 

 slightly flaring, apical margin weakly sinuate either side of middle; 

 gonostylus variable in shape (figs. 197a,b). 



Length of body: 3.94(3.85-4.04). 



Female.— Very similar to male, but measurements averaging larger. 



Head: Length-width ratio, 0.87(0.83-0.90) :L21(L16-L28); inter- 

 ocular width, 0.91(0.86-0.96). Antennals: I, 0.24(0.23-0.26); II, 

 0.15(0.14-0.16); III, 0.20(0.20-0.21); IV, 0.20(0.20-0.21); labials: I, 

 0.42(0.41-0.43); II, 0.56(0.53-0.63); III, 0.43(0.43-0.46); IV, 0.34 

 (0.33-0.36). 



Pronotum: Length-width ratio, 1.24(1.17-1.36) :2.67 (2.53-2.86). 



Scutellum: Length-width ratio, 1.65(1.56-1.82) :1.80(1.75-1.89). 



Length of body: 4.25(4.14-4.40). 



Type data. — The locality of the type specimen (USNM) was given 

 by Uhler as "California." 



Specimens studied. — 13 males, 20 females. 



United States: California: Asilomar, Carmel, Dillon Beach (Marin Co.), 

 Monterey Co., Pacific Grove, Plumas Co., Point Arena, San Francisco, Santa Cruz, 

 Sea Side, Sonoma Co.; February, April to September. 



Mexico: "S. W. Mex." 



Discussion.- — ^All named California specimens of Microporus that 

 were studied bore the determination of testudinatus, suggesting that 

 locality rather than morphology was used as the delimiting factor, 

 especially as none of the specimens from outside of California bore 

 that determination. The Mexican specimen cited above was from 

 the Uhler collection (USNM) and may have been the one on which 

 he based the Mexican locality in his monograph. All other Mexican 

 specimens examined during this study belonged to obliquus. 



Genus Cydniis Fabricius 



Cydnus Fabricius, 180:3, p. 184. 



Brachijpelta Amyot and Serville, 1843, p. 89. 



Pending completion of studies of the Cydnidae of the Easter^ 

 Hemisphere, the conclusions of China (1943) concerning this genus 

 are here accepted without question. The decision to do this was a 

 practical solution to a complex problem requiring review of a very 

 extensive literature of a genus which apparently is not yet established 

 in this hemisphere. 



