160 MEMOIRS ON THE COLEOPTERA. 



preceding; prothorax moderately transverse, only slightly narrowed and 

 very moderately arcuate at the sides from the rounded base to the truncate 

 apex, much wider than the head, equal in width to the elytral base, very ob- 

 soletely subimpressed along the median line; elytra rather short, with dis- 

 tinctly diverging sides, the suture not quite as long as the prothorax; abdomen 

 distinctly narrower than the elytra, gradually and moderately tapering 

 throughout, the apex not very acute, the fifth tergite barely one-half longer 

 than the fourth. Length 1.4 mm.; width 0.27 mm. Arizona (Tucson). 



A small and very slender species, without any very notable 

 structural peculiarities. 



Colpodota zephyrina n. sp. Not strongly fusoid, moderately convex, 

 rather shining, the reticulation fine, distinct, very coarse, irregular and evi- 

 dent on the abdomen, where the punctures are fine and rather sparse, else- 

 where minute, feebly asperulate and very close; color blackish-piceous, 

 the elytra not paler, the abdomen black, the legs a little paler, piceous; 

 head rather large, evidently transverse and laterally swollen at base, the 

 eyes smaller, convex, at much more than their own length from the base; 

 antennae piceous, moderately long, feebly incrassate, the second joint longer 

 and a little thinner than the first, longer than the third, the fourth very 

 slightly, the outer joints more distinctly, wider than long, the last gradually 

 acutely pointed, rather longer than the two preceding; prothorax somewhat 

 strongly transverse, much wider than the head and as wide as the elytral 

 base, the sides nearly straight and subparallel, becoming broadly rounded 

 and converging in about apical half, the base broadly, obtusely lobed medi- 

 ally, oblique at each side to the obvious basal angles, the median line 

 extremely obsoletely impressed; elytra large, almost parallel, only moder- 

 ately abbreviated, the apices broadly and feebly sinuate externally, the suture 

 nearly a third longer than the prothorax; abdomen a little narrower than 

 the elytra, gradually and moderately tapering thence to the obtuse tip, the 

 fifth tergite about one-half longer than the fourth. Length 1.5 mm.; width 

 0.32 mm. California (Gilroy Hot Springs, Sta. Clara Co.). 



This species is aberrant, when compared with such forms as 

 acutella and simulata, in the form of the prothorax, large elytra, 

 sculpture of the abdomen and in many other directions. 



Colpodota egens n. sp. Moderately slender, fusoid and convex, somewhat 

 shining, the abdomen strongly so and with coarse and very irregular micro- 

 reticulation, as in the preceding, the punctures elsewhere fine, more or less 

 close and asperulate; color deep black, the elytra dark piceous-brown, the legs 

 paler piceous; head distinctly transverse, the eyes not prominent and at 

 their own length from the base, the tempora not more prominent, the an- 

 tennae moderately long, slender, feebly incrassate, piceous, the second joint 

 as long as the first and slightly thinner, much longer and less obconic than 

 the third, the fourth slightly wider than long, the outer joints distinctly 

 transverse, the last ogivally pointed and fully as long as the two preceding; 

 prothorax transverse, almost evenly rounded at base, much narrower at 



