NORTH AMERICAN BOSTRICHIDAE 53 



slightly expanded and elevated at middle of apical declivity; each 

 elytron with two tubercles at anterior margin of apical declivity, the 

 sutural one long and acute, the lateral one costiform and obtuse at 

 apex, and with Four or five obtusely rounded, longitudinal costae. 



Body beneath densely clothed with long, recumbent and semierect, 

 brownish-yellow hairs; abdomen finely, densely granulose; last visible 

 sternite broadly rounded at apex. 



Female. — Differs from the male in having the front of head and 

 clypeus distinctly, finely granulose, the sutural tubercle on anterior 

 margin of the apical declivity of each elytron short and obtusely 

 rounded at the apex, and the surface on the declivity finely, densely 

 punctate and granulose. 



Length 33-51 mm., width 8-18 mm. 



Type locality. — Palm Springs, Calif. Type in the Horn Collection 

 in the Academy of Natural Sciences of Philadelphia. 



Distribution. — According to present knowledge of the distribution 

 of this species it occurs in the canyons on the east side of the Colorado 

 Desert. Calif, (formerly the upper end of the Gulf of California) , and 

 at least as far south as Catavina, Lower California, about 300 miles 

 south of Palm Springs. Calif. It has been recorded from Palm, Mur- 

 ray, Andreas. Taquitz, Chino, and Thousand Palm Canyons, and 

 Seven Palms, Calif., and Catavina, Lower California. 



Hosts. — It has been found only in the Washington or fan palm 

 (Washi?igto?iia filifera Wendl.). It has been reported as attacking 

 date palms in the Coachella Valley, Calif., but this report should be 

 verified. 



Horn (1886) described icrightii from specimens collected by W. G. 

 Wright in the Mojave Desert. Calif., and for which he erected the 

 genus Dinapate. This is the only known species of Dinapate, and 

 also the largest known bostrichid. Hubbard (1899) considered this 

 beetle. rare and stated that the species would soon become extinct. 

 However, from 1917 to 1930 the beetles assumed the proportions of a 

 minor pest in Palm Springs. A number of large palms had been 

 transplanted into the village, and Wymore (1928) writes that 90 per- 

 cent of these palms were severely injured by the beetles burrowing 

 into the succulent growing tips of the palms and also in the trunks of 

 the living palms, causing some to die. Hubbard (1899), while at San 

 Diego, Calif., ascertained that the type locality of Dinapate wrigMii 

 is Palm Springs, Calif., and not the Mojave Desert, as stated by Horn. 

 Dr. Murray, the landlord of a little hotel at Palm Springs, told him 

 that Mr. Wright came almost every September to that place and al- 

 ways went up into the canyon. Hubbard stated that he could easily 

 trace the operations of Mr. Wright among the fallen palm trunks. 

 Wright had even cut down a number of the largest and tallest trees, 

 no doubt in the hope of attracting the beetles to the freshly cut timber. 



Tribe Bostrichini 



Bostrichini LeConte, 1861, Smithsn. Inst. Misc. Collect. 3 (1) : 2(»7-2os ; Kiesen- 

 wetter, 1877. in Erichson, Naturgesch. Insect. Dent.. Coleopt.. v. 5. pt. 1. pp. 7. 

 25-41, fig. ; LeConte and Horn. 1883, Smithsn. Inst. Misc. Collect. 507 : 227. 228. 



Bostrichinae Anderson, 1939. Wash. Acad. Sci. Jour. 29: 390-391 (larvae). 



Bostrychini Lesne, 1901. Abeille 30 : 84-110 ; Csiki, 1903, Roy. Lapok. 10 : 17-20 ; 

 Lesne, 1921, Assoc. Franc, pour l' A vane. des. Sci., Cong, de Strasbourg (1920), 



