to the CicindelidcB faima of Mexico. 503 



angles distinct though obtuse, the middle in the 2 uni- 

 dentate, in the c? unarmed. 



Cicindela rufiventris, Dej. 



Among the great number of examples of the different 

 varieties from very numerous localities referred in the 

 ' Biologia ' to this species on the authority of Chaudoir, 

 I have failed to find a single specimen agreeing with 

 Dejean's description in the essential peculiarity of the 

 elytral markings, viz., a crescent-shaped apical lunule 

 and three detached spots in triangle on the disk. The 

 detached spots of course represent the marginal and dis- 

 coidal ends of the median fascia and the posterior mar- 

 ginal spot, but in Mexican examples it invariably occurs 

 that when the median fascia is dissolved into spots the 

 apical lunule is also disintegrated. The apical lunule 

 remains entire when the median markings degenerate 

 only in closely-allied N. American species, e.g., C. cmiia- 

 tilis. Dejean's example was from Palisot de Beauvois's 

 collection, and labelled " St. Domingo"; whether this is 

 correct, or the specimen came from the south-eastern 

 States, is doubtful, and the Mexican forms perhaps do 

 not belong to the same species. 



C. rvjirentris (?) var. IG-puuctata, Klug (= ruhri- 

 rentris, Chevr.). — In its typical form this var. is small 

 (9 — 10 mm.), generally dark and bluish in tint, and 

 the markings form on each elytron eight equal- sized 

 spots, the two median spots sometimes connected by a 

 thin line. It occurs chiefly in the vicinity of the city of 

 Mexico. The hind trochanters are dark brassy brown, 

 the labrum scarcely at all produced in the middle even 

 in the ? . 



Var. C. Vcntanasa. — Same as lO-jninctata, but larger 

 (10^ — 12 mm.), and relativelj-" narrower. Apparently 

 common at Ventanas in Durango, and at La Noria in 

 Siualoa, This var. graduates into the var. Sallcei of 

 Sinaloa. 



Var. '?. — A little longer than IG-imnctata ilO| — 11 

 mm.) ; elytra more parallel, dark purple-coppery with 

 green reflections ; median fascia and apical lunule 

 entire (narrow in the middle) ; trochanters the same. 

 Northern Sonora and Chihuahua ; also Arizona. 



Var. Sallei, Chevr. — Distinguished from var. 16- 

 pnnctata and Vcntanasa chiefly by the larger elytral 



