H. C. FALL 409 



Prothorax moderately narrowed in front, sides broadly rounded, slightly 

 incurved basally, with a short faint sinuation before the hind angles; punctua- 

 tion uneven, sparse except in the black areas, side margins smooth; M broadly 

 marked, the middle strijje entire, broader in front and sometimes divided by a 

 narrow pale line, or enclosing a small elongate i)ale s])t)t, but not as a rule 

 connected with the lateral stripes. 



Elytra irregularly punctate Iniso-suturally. striae lightly inipn ssed and all 

 more or less distinct, the fifth and sixth confused in front of the middle, the 

 eighth nearly straight; shield rather small, elongate triangular; narginal 

 intersj^ace with two or three pvmcturcs sub-basally and sen (tin (s die er two 

 further back. 



Pygidiinii black with the usual yellow spots. liofly beneath black, abdcmen 

 with the tij) and narrow side margin more or less jiale. Legs pale with 

 rather broad black femoral rings, the tibiae more or less l)lackish or dusky in 

 apical half. 



LcngtJi 2.2 to 2.6 nun.; width 1.2 to 1.4 mm. 



Distribulion. — Arizona: Williams, July 3; also taken here July 20, and a 

 Flagstaff, Jul}' 5, by Barber A: Schwarz; "Ari" (Horn Coll.). 



I have leased my identification of this species on a specimen 

 from (Jrizaba, Mexico, so identified b}^ Jacoby and kindly sent 

 me for study by Mr. C. J. Gahan of the British iVIuseum. This 

 specimen has the thoracic markings less conspicuotisly vitti- 

 form than in most of our representatives l)ut the difference is 

 probably of no consequence and I find nothing else to support it. 



92. Pachybrachys nobilis new species 



\'er3' large, yellow, prothorax rather finely and closely reddisli 

 l)ro\vn punctate, with small but diffuse rust colored basal spots, 

 the markings becoming in some examples — notably females — 

 darker and more extended. Elytra with black standard spots, 

 those of the inner series often more or less longitudinally con- 

 fluent; punctuation in great part confused. Antennae very 

 slender, filiform. Eyes distant; a faint trace of ocular lines very 

 near the eyes. Pygidium broadly margined in the female: front 

 claws of male small. Ave. length 5.8 mm. Arizona. 



//ead scarcely as wide as i\\v thoracic apex, front moderately pimctate, more 

 closely in the female, supra-orbital groove rather deep and extending faintly 

 along the innei- margin; markings variable in development, t!ie front predom- 

 inantly yellow. ICves separated in the male by twice the length of the basal 

 antennal joint. :in<i by two and one-fourth times the length of tiie basal joint, 

 or a little more, in the femak>. Antennae nearly as long as the body in the 

 male, three-fourths the length of the body in the female, very slender, the joints 

 nearly filiform, the tenth four or five tunes as long as wide, outer joints dusky, 

 basal joint dai'ker above. 



TR.\NS. AM. E.NT. SOC, XLI. 



