NORTH OF MEXICO. 361 



clothed :>^ tin- bead; anteriorly feebly ei angles obtuse, sides feeblj rounded, base rounded, angles n< 



reel ingular. Elytra elongate oval, sub-parallel, apex obtuse, lose feeblj einarginate, humeri moderately prominent ; 

 moderately convex above with striae of coarse punctures, and clothed as in the bead and thorax. I n ler surface "i 

 bodj finer) punctured and pubescent, the under surface i f thorax and protli i densely. 



Within each hind angle the base of the prothorax is a rather broad impression, ren- 

 dering the middle of the base more prominent ; there is also a slight impression opposite 

 the scutellum. The pubescence of the upper surface is uniformly distributed on each of 

 the divisions except on the elytra, where a sub-transverse triangular spot more denuded 

 is seen at the middle of the lateral margin and mid-way between this and the apex. 'I ; 

 spots are broadest at the margin and are present on both sides of the two specimens in my 



p ion. As compared with the European sp icies, the thorax is longer, less narrowed 



behind and feebly emarginate in front ; the base slightij narrower than, and the apex 

 equal to, the width of the elytra! base. Tl id color of the insect i- reddish brown 



one of the specimens being rather darker. 



Length .12 inch. 



Hare in Owens' Valley, California, under stom s 



ALAUDES, n. g. 



Anterior tibiae broad, triangular, spurs very large. Intercoxal process of abdo 

 short, broad, rounded in front. Head transverse, broader behind, emarginate in fi 

 sinuate ok the sides. Eyes absent. Antenna' ten-jointed, first two thicker, intermediate 

 short, broader than long, compactly placed, last three forming an oval compact club, of 

 which the terminal joint is longer. Mentuin very short, transverse; ligula not promi- 

 nent; palpi very short. Maxillary palpi short, last joint oval, slightly arcuate. Gular 

 region prominent, peduncle of mentum broad, emarginate, angles prominent forward. 

 Prost mum not prominent. Thorax very transverse. Elytra elongate oval, straight on 

 the sides, connate ; body apterous. Scutellum transverse. Hind tarsi with the first joint 

 rather shorter than the last. 



Tin absence of eyes and the form of the intercoxal process of the abdomen will serve 

 to distinguish this genus from any of those with triangular tibiae and with the last joi 

 the maxillary palpi oval. The margin of the head is slightly sinuate at the position usu- 

 ally occupied by the eyes, and the anterior and posterior canthi of the eye here are in 

 contact. I! meath the margin of the front the side of the he id forms a broa 1 groove, near 

 the anterior limit of which the antenna' as usual, arise. This broad _ maj be con- 



sidered a- merel) the continuation of that in which the antenna' usually arise, owing to 

 absence of any prominence in the region of the eye. The gular region is flat, suddenly 

 declivous on the sides; the lateral margins converge to the front, where it is d eply emar- 

 ginate, with the angles prominent. The mentum is situated at the bottom of this semi- 



AMERT. PHILOSO. SOC. — VOL. XIV.— 



