228 CALIFORNIA ACADEMY OF SCIENCES. 



punctate; fifth segment two-thirds longer than the fourth. Legs rather short; 

 posterior tarsi short, first and second joints equal in length, slightly longer 

 than wide, much shorter than the fifth; tibiae obliquely truncate and finely 

 fimbriate at tip. Length 3,3 mm. 



California; (Napa and Sonoma Cos. 4). 



The specimens are all females, the sixth segment being 

 broadly rounded behind. The present species is remarka- 

 ble for its long parallel prothorax, which is scarcely at all 

 produced in front of the apical angles. It may be distin- 

 guished from pundatus by its slightly larger size and much 

 liner and denser pronotal punctuation. 



The oblique apical truncation of the hind tibiae appears 

 to characterize a large number of genera; the truncation is 

 slightly excavated and bordered exteriorly by an erect line 

 of long, slender, closely-placed setae. 



The tabular statement of our Pasderini given in this 

 Bulletin (Vol. II., p. 38), requires modification since the 

 publication of the Central American genera by Dr. Sharp 

 in the Biologia Centrali-Americana, and as the assumption 

 upon which the positions of one or two genera are assigned 

 has been found to be erroneous, the following table is 

 offered as a substitute until the entire group can be revised. 

 This scheme would be much more useful if it could have 

 included all the American genera, but as in the present state 

 of literature there would be considerable doubt regarding 

 the position of several, I have thought best to restrict it for 

 the present to the genera occurring north of Mexico. 



I — Ligula not tricufipid, usually bilohed. 

 Prosteruum membranous under and behind the coxte. 



P^DERI. 



A — Fourth tarsal joint normal, not bilobed. 



Antennae anteriorly geniculate, first joint greatly elongate. 



Neck broad; abdomen carinate at base Hesperoblum. 



Neck uarroM'; abdomen not carinate Ababactus. 



Antennae posteriorly geniculate, basal joint moderate in length. 



First joint of the posterior tarsi not longer than the second. 



