H. C. FALL 473 



Distribution.— Calif or nin: San Diego, May 14; Pomona, May 13; Arrowhead, 

 Mar. 31; Los Gatos (Hubbard k Schwarz); Lo8 Angolos Co. (Coquillett), San 

 Bernardino Co., and Santa Clara Co. (Koebele); Alameda Co. (Horn Coll.); 

 Fairfax, Marin Co., June 10 (Van Dyke). Lower California: ETisenada (Beyer). 

 New Mexico: Near Las Vegas Hot Springs, 1 9 , identity doubtful (Snow Coll.). 

 Texas; Round Mountain (Wenzel Coll.); "Tex." Collected by Belfrage, Le- 

 Conte, Horn, Nat. Mus. and other collections, l)ut always without indication 

 of exact locality. 



About the only notal)le variation cxhiljited by this species is 

 in the color of the prothorax. This varies from fairly l:)right to 

 dark blood red, and may l)e entirely without darker shades, quite 

 often, however, the anterior margin is blackish at the middle, this 

 color showing a tendency to spread Ixickward even to the base. 

 Rarely the entire surface except the side margins is black. The 

 surface of the prothorax is sometimes barely visibly alutaceous, 

 and at others quite evidently, though very finely so. 



154. Pachybrachys discoideus Bowditch 



Black, head and legs sometimes spotted with white or pale yel- 

 low; prothorax rarely entirely black, usually with side margins, 

 front margin in part, and short median anterior line yellowish 

 white; elytra orange red with wide lilack sutural stripe not at- 

 taining the apex; eyes in males separated by very little more than 

 the length of the basal antennal joint; front claws of male large. 

 Ave. length 3.4 mm. Florida; District of Columbia. 



Head not wider than the thoracic apex, rather sparsely punctate, black with 

 small whitish spots which are larger in the male, in which the front may be 

 described as yellowish white with broad black tyi)ical markings. Eyes dis- 

 tinctly more approximate in the male than the vertical width of their upper 

 lobes, and in the female slightly more distant than the width of their upper 

 lobes, or by a little less than twice the length of the basal antennal joint. An- 

 tennae (d") about three-fourths, or ( 9 ) about one-half the length of the body, 

 the tenth joint in the male fully three times as long as wide, basal joint and 

 outer joints blackish, intermediate joints pale. 



Prothorax strongly narrowed in front, sid(>s as seen from above nearly 

 straight or even faintly sinuate anteriorly, ])unct nation not close, rather fine, 

 side margins smooth, surface semi-shining. The color may be described as in 

 the above diagnosis, or as yellowish white with heavily suffused black M, leav- 

 ing the side margins, front margin in part and fre(]uently some smaller discal 

 spots pale; of the latter the short median line in front, and more rarely two 

 small basal sjiots are most noticeable. 



Elytra with confused punctiu-es in the ba-n-sutiu-al region, elsewhere with 

 the punctures serially or sub-s(>rially arranged in unimi)ressed lines, the eighth 



TRANS. AM. ENT. SOC, XLl. 



