COLEOPTERA OF THE LOWER RIO GRANDE. IO q 



Median line distinct, not deep except in two points near the 

 middle of its length, where it is almost foveate. Elytra nearly 

 twice as wide as the thorax, sides nearly parallel, slightly 

 broader at about tvyo thirds of the length, apex truncate and 

 slightly arcuately emarginate, sutural angle not rounded, outer 

 angle prominent. Surface striate, striae shallow on the disk, 

 deeper on the sides, discal interstices rather broad and flat. 

 The punctures of the striae are quite fine, though readily visi- 

 ble, closely placed, although not confluent, and are shallower 

 in the discal striae than in those of the sides. Under surface 

 black, shining, prothorax punctured, abdomen nearly smooth. 

 Legs black, tarsi piceous. Length 4 mm. 



Apristus subsulcatus Dej. Laredo, one specimen. July 

 24th. Common at Columbus. North to Canada, west to New 

 Mexico. 



Blechrus pusio Lee. Rare in July. " Ohio to Texas." 



Axinopalpus biplagiatus Dej. Two specimens, sifted 

 from dead leaves in July. Found over a very wide extent of 

 territory; from Canada on the north, to New Mexico and 

 Texas, and from Maine to California. 



Tecnophilus croceicollis var. pilatei Chaud. One spe- 

 cimen found with the colony of Pogonus texanus, at Point 

 Isabel; also sent to the National Museum by Mr. Towsend. 

 The variety pilatei is. as far as known, confined to Texas, and 

 includes those forms in which the head and thorax, above and 

 beneath, also the legs, antennae, meso- and metasternum are 

 red, the elytra bright green or blue. In its varieties, the spe- 

 cies is very wide-spread, extending from San Diego and Bar- 

 stow, California, to Oregon, thence to Montana, Utah, New 

 Mexico (Mesilla Valley. Coolidge), and Texas. 



Euproctus texanus n. sp. Rufo-testaceous to rufo-pice- 

 ous, shining. Head smooth on the occiput, impressed and 

 roughened above the anterior half of the eyes, the impres- 

 sion extending forward to the base of the labrum. Clypeal 

 region with a few small punctures; a frontal crescent-shaped 

 impression, vaguely defined, from which radiate a few fine 



