H. C. FALL 445 



Head rather sparsely punctate, spots almost wanting, median line finely- 

 impressed; eyes separated in the male by about one and two-fifths times the 

 length of the basal antennal joint or by about the length of the first two joints. 



Prothorax moderately transverse, sides nearly straight and a little converg- 

 ent from near the base to apex; punctuation uneven, side margins smooth, 

 spots smaU and vague. 



Elytra with confused punctuation in a moderate baso-sutural triangle; striae 

 feebly or scarcely impressed, three, four, seven and eight fairly regular and 

 entire, five and six much confused; shield triangular, di.stinct, of moderate size; 

 marginal interspace impunctate; eighth stria with a strong sigmoid dislocation 

 near the base. 



Pygidium typically marked with black and yellow. Body beneath black, 

 last ventral in part yellow. Legs pale yellow with small menlian femoral and 

 tibial darker spots or clouds. 



Length 2.7 to 3.1 mm.; width 1.35 to 1.5 mm. 



Distribution. — Arizona: Bill Williams Fork (Snow), type. Utah: St. George, 

 July (Wickham). 



The above description is drtiAvn from a male from the type 

 locality. In it the eyes are slightly more approximate than they 

 are in the actual type, which I have examined, but the difference 

 is probably purely an individual one. In the single St. George, 

 Utah, specimen before me — a male — the spots are blacker and 

 more distinctly defined than in the typical form, rather strongly 

 resembling some specimens of laevis. A single female example 

 in my own collection taken by Snow in Arizona (exact locality 

 not indicated) is almost certainly identical with the Utah male, 

 differing only in its fainter maculation, and as might be expected 

 in its more robust form. As compared with laevis the present 

 species is rather larger, with less distant eyes, longer antennae, the 

 tenth joint four times as long as wide (less than three times as 

 long as wide in laevis), the elytral shield less prolonged. 

 125. Pachybrachys conspirator new species 



I have separated under this name four examples sent me by ^Ir. 

 Chas. Schaeffer which agree so closely in almost all respects with 

 the nearly immaculate forms of nubilus as to require no separate 

 description. The males have the same narrow cylindrical form 

 and very slender antennae nearly as long as the entire body; the 

 standard spots are small and faint on tlie pronotum, entirely 

 absent or in part very faintly indicated on the elytra; the elytral 

 striae are more broken and irregular than in nubilus, the marginal 

 interspace with a few punctures^more numerous in the female — 

 and the eyes are separated by fully one and three-fourths times 



TRANS. A.M. ENT. SOC, XLI. 



