182 BULLETIN" 14 5, UNITED STATES NATIONAL MUSEUM 



teriorly, and not continuing on the same line with the lateral margin 

 of the second segment ; vertical portions of segments densely clothed 

 with long, recumbent, white hairs and efflorescence; pygidium with- 

 out a projecting carina. Prosternum rather coarsely rugose, and 

 densely clothed with long, recumbent, white pubescence and efflores- 

 cence; prosternal lobe broad, strongly declivous, and feebly, arcu- 

 ately rounded or subtruncate in front; prosternal process broad, the 

 sides nearly parallel to behind the coxal cavities, then broadly 

 rounded to the apes. Tibiae slender, anterior pair feebly arcuate, 

 and the anterior and middle pairs armed with a short, thick tooth 

 on inner margin at apex. Posterior tarsi shorter than tibiae and 

 the first joint as long as the following two joints united. Tarsal 

 claws nearly similar on all feet, cleft near the tip, the inner tooth 

 slightly shorter than outer one, and not turned inward. Genitalia 

 not examined. 



Length, 9.5 mm.; width, 3 mm. 



Female. — Similar to the male, but is slightly more robust; pros- 

 ternum sparsely clothed with long, recumbent, whitish pubescence; 

 abdomen more broadly exposed above; anterior and middle tibiae 

 armed with a very short tooth at apex, and the tarsal claws cleft 

 closer to the middle than in the male. 



Length, 10.25 mm. ; width, 4 mm. 



Redescribed from the male holotype in the Snow collection in 

 the University of Kansas. 



Type locality. — Bill Williams Fork, Ariz. 



DISTRIBUTION 



Material examined : 



Arizona: Bill Williams Fork (F. H. Snow). Tempe, October 18, 1911 (E. G. 

 Smyth). 



Variation. — No variation worthy of note has been observed in the 

 few specimens examined. 



Host. — Unknown. 



This is one of the most robust species of this genus, and in this 

 respect resembles some of the Acmmodera, and seems to be very 

 rare. Only three examples have been seen by the writer, the holotype 

 in the University of Kansas collection and two females from Tempe, 

 Ariz., in the collections of F. H. Fall and Warren Knaus. 



59. AGRILUS COSTIPENNIS, new species 



Figure 41 



Male. — Form resembling that of walsinghami Crotch, and uni- 

 formly bronzy brown, with a more or less cupreous tinge. 



