VOL. 54, NO. 1, JANUARY 1978 
27 
Head minutely punctate, very finely pubescent, long, erect setae present along anterior 
margin and around eyes; antennae extending about three segments beyond elytra, scape 
gradually enlarged, segments three to five slightly enlarged, third segment equal in 
length to first, fourth equal to third, fifth shorter than fourth, segments very finely, rather 
sparsely pubescent, basal segments with several long, erect setae at apices. Pronotum 
broader than long, sides angulate; disk thinly impressed behind apex and before base, 
middle vaguely, shallowly tricallused; punctures very fine, dense; pubescence minute, 
appressed, with a few, long, erect setae interspersed; prosternum transversely rugulose, 
intercoxal process almost plane, more than one-half as broad as coxal cavities; meso- and 
metasternum finely punctate and pubescent. Elytra about IV2 times as long as broad; 
punctures behind scutellum moderately coarse, usually separated, extending along 
suture to beyond middle, other basal punctures finer, rather sparse, irregular; erect setae 
arising out of punctures shorter than second antennal segment, underlying pubescence 
very fine, dense; apices narrowly rounded. Legs with femora strongly clavate, finely 
punctate and pubescent. Abdomen finely punctate and pubescent; last sternite rounded 
at apex. Length, 6-9 mm. 
Female: Form similar. Antennae slightly longer than body. Abdomen with last sternite 
impressed and carinate at middle. Length, 7-9 mm. 
Holotype male, allotype (California Academy of Sciences) and 44 paratypes (19 males, 
25 females) from 2 miles NE San Pedro, Baja California Sur, Mexico, 19 September, 1967, 
under bark of Bursera (J. Chemsak, A. & M. Michelbacher). Additional paratypes all from 
Baja California Sur as follow: 6 males, 6 females, 3.5 miles NE San Pedro, 7 September, 
1967 at light (Chemsak and Michelbacher); 2 males, 3 females, 3 miles N. San Pedro, 6 
July, 1938 (Michelbacher & Ross); 3 females, 10 Km. S San Pedro, 23 August, 1976 (E. 
Giesbert); 6 males, 6 females, 5 miles SW La Paz, 7 September, 1967, under bark of Bursera 
(Chemsak and Michelbachers); 1 male, 2 females, 7 miles W La Paz, 6 August, 1966 (E.G. & 
J.M. Linsley, P.D. Hurd, Chemsak), 6 September, 1967 (Chemsak and Michelbachers); 1 
female, 5 miles S La Paz, 17-22 September 1967 (Chemsak & Michelbachers); 4 males, 1 
female, 15 miles W La Paz, 5 July, 1938 (Michelbacher and Ross); 2 males, 1 female, 20 
miles NW La Paz, 16 July, 1938 (Michelbacher & Ross); 15 males, 9 females, 26 miles W La 
Paz, 11 August, 1966, at lights (Chemsak, Powell and Doyen); 1 female, 25 miles W La Paz, 
30 August, 1959 (Radford & Werner); 1 male, 1 female, El Triunfo, 7 July, 1938 
(Michelbacher & Ross); 1 male, 1 female, 2 miles NW El Triunfo, 12 August, 1966 
(Chemsak, Doyen and Powell); 4 male, 4 females, San Jose del Cabo, 11 July, 1938 
(Michelbacher and Ross), 11-16 September, 1967 (Chemsak and Michelbachers); 3 males, 
1 female, 6 miles N San Jose del Cabo, 15 September, 1967 (Chemsak and Michelbachers); 
2 females, 10 miles SW San Jose del Cabo, 9 July, 1938 (Michelbacher and Ross); 18 
males, 24 females, 7 km. N Cabo San Lucas, 26-27 August, 1976 (E. Giesbert); 3 males, 2 
females, San Bartolo, 13 July, 1938 (Michelbacher and Ross); 1 male, 5 miles W San 
Bartolo, 13 July, 1938 (Michelbacher and Ross); 3 males, Todos Santos, 15 July, 1938 
(Michelbacher and Ross); 1 male, 4 miles N Todos Santos, 2 September, 1959 (Radford 
and Werner); 1 female, El Carrizal, 25 August, 1976 (E. Giesbert). 
Additional specimens from 10 miles S Punta Prieta, 15 miles N El Refugio, 20 miles N 
Comondu, and 45 miles N San Ignacio are also assignable as this species. In several of 
these localities P. minima occurs sympatrically with P. fabra Horn, which suggests a 
possible subspecific relationship between fabra and the Cape population. However, the 
lack of adequate material from the central and northern parts of the peninsula and 
apparently significant structural differences make a subspecific designation untenable at 
this time. 
The broad, flattened intercoxal process of the prosternum, smaller 
average size and antennal scape equal in length to the third segment 
separate minima from fabra. P. nudicornis (Bates) differs by the longer 
setae on the elytra, pale pubescent humeri of the males, and by 
having the antennal scape longer than the third segment. 
