PKOC ENT. SOC. WASH., VOL. 65, NO. 3, SEPTEMBER, 1963 247 HESPEROCIMEX COCHIMIENSIS NEW SPECIES, FROM BAJA CALIFORNIA, MEXICO (Hemiptera: Cimicidae) 1 Raymond E. Ryckman 2 and Norihiro Ueshima 3 The name Hesperocimex cochimiensis is being proposed for the population of cimicids found parasitizing Purple Martins in the Car-don cactus belt of Baja California, Mexico. The species name cochi-miensis is proposed as a memorial to the Cochimi Indian Nation which occupied most of Baja California ; these hardy people became extinct subsequent to the occupation of their lands by a culture foreign to them. A detailed report of the ecology, distribution, taxonomy and cytotaxonomy of the genus Hesperocimex is in manuscript form and is to appear in the "University of California Publications in Entomol-ogy" series, University of California, Berkeley. Hesperocimex cochimiensis was collected 28 miles south of Punta Prieta, July 2, 1957 ; 30 miles south of El Arco, July 4, 1957 ; and 45 and 9 miles northwest of San Ignacio, July 5, 1957. The first collec-tion was in Baja California Norte and the latter three were from Baja California T-S. Each of the above collections were made from wood-pecker nest cavities in the Cardon cactus, Pachycereus Pringlei; the host was the Purple Martin, Progne subis. The collectors were Ray-mond E. Ryckman, Dean Spencer, xllbert E. Ryckman and Joseph V. Ryckman. Table 1 is presented as a diagnostic description indicating the morphological differences between Hesperocimex cochimiensis and the other species of the genus. Hesperocimex cochimiensis, new species (Figure 1) Body color light brown, (intermediate between golden H. coloradensis and dark brown E. sonorensis). Head, sparsely clothed with setae, width including eyes 0.73 mm.; interocular 0.58 mm.; length 0.66 mm. Antennal segments, (proximal to distal) 10:19:20:16; sparsely clothed with bristles. Tip of rostrum reaching anterior margin of mesosternum; rostral segments (proximal to distal) 15:13:15. Pronotum, width 1.03 mm.; length 0.42 mm.; lateral margins fringed with long bristles. Wing pads dark on proximal and distal surfaces, central area relatively light. Keel of metasternum triangular, length 0.25 mm.; greatest width 0.3 mm. Coxae separated (fore to hind) 5:17:22. Length of first pair of legs, femur 37; tibia 35; tarsi and claws 18; — second pair of legs, femur 40; tibia 44; tarsi and claws 25; — third pair of legs, femur 50; tibia 64; claws and tarsi 26; legs Collection of the specimens was made possible by a grant from the Associates of Tropical Biogeography of the University of California. department of Microbiology, Loma Linda University, Loma Linda, California. 3 Department of Entomology and Parasitology, University of California, Berke-ley, California. This investigation was supported (in part) by the U. S. Army Medical Research and Development Command, Department of the Army, under Research Grant Number DA-MD-49-193-62-G45, and by funds supplied by The Associates in Tropical Biogeography of The University of California.