308 STUDIES IN ALAUDES (cOLEOPTERA; TENEBRIONIDAe) 



Head rather large, about a third of its width wider than long; sides sinuate 

 at the usual position of the eyes, the sinuation limited by an anterior and a 

 posterior angulation, the latter or basal angle slightly more prominent laterally 

 than the former; apex very moderately sinuate at middle, lateral lobes arcuate 

 and continuous with the moderately oblique sides of the front, margin more or 

 less subdiaphanous and slightly reflexed; base broadly arcuate and scarcely 

 sinuate laterally. 



Pronolum slightly more than twice as wide as long; sides moderately promi- 

 nent and rounded in anterior half, thence sinuately converging to become 

 parallel before the basal angles; base transverse in middle two-fourths, sinuate 

 in lateral fourths and adapted to the humeral region of the elytra; basal angles 

 blunt, somewhat prominent laterally, including the investing scales; apex 

 broadly, rather strongly and arcuately sinuate; disk rather more than moder- 

 ately convex; basal depression occupies rather more than basal two-fourths, 

 its floor flat, quite semicircularly rounded anteriorly, sides moderately pre- 

 cipitous, forming an angle with the floor. 



Elytra about three times as long as the pronotum, about a third longer than 

 wide; sides rather less than moderately arcuate, more rapidly so in apical 

 third to the subogival apex; base broadly and feebly emarginate, humeri 

 feebly dentiform; disk moderately and quite evenly convex, punctures large 

 and round, arranged in rows, obsolescent on the scutellar declivity, but attain- 

 ing the base laterally, interspaces bearing a single series of widely spaced erect 

 scales, marginal series clavate, i.e. increasing gradually in width from base to 

 apex, inner series becoming more or less subclavate or linear on the disk, but 

 more hair-like at base. Scutellum transverse with a few long slender hairs. 



Head and prothorax beneath, and legs clothed with scales. Prosternum 

 rather densely punctate, with a few scattered scales. 



Measurements. — Length, 1.7 mm.; width, 0.7 mm. 



Habitat. — Pasadena, Los Angeles County, southern California. 

 Horn gives only "California". 



Sixteen specimens studied. Ttjpe in the Horn Collection. 



Mr. Martin's specimens were identified as singularis by Prof. 

 Fall. Horn's figure in the "Revision" is quite misleading as to 

 the general form of the insect. It is drawn too robust and too 

 oval, sides of the pronotum too straight, basal angles too obtuse 

 and blunt, basal projections too strong, and the sides of the head 

 are more sinuate than represented. 



As a matter of fact the basal angles of the pronotum are clothed 

 with a dense tuft of scales which render the angles more promi- 

 nent than they really are. The true angles can often be seen as a 

 blackish line dorsally at base of the squamous tuft. Horn's 

 specimen may have had the angles denuded. 



