March, iQoi.] Cai-dell: The Genus Sinea of Amyot (-■ Serville. 7 



In the discussion of this species under the name iindiilata Mr. 

 Champion describes a variety thus: " Var. The spines on the 

 head shorter, and those on the anterior lobe of the pronotum reduced 

 to conical tubercles, the neck simply granulate ( c? 9 )." He found 

 intermediate forms connecting the variety with the typical specimens. 

 The variety is represented in the National Museum by both male and 

 female specimens. 



Sinea coronata Stdl. 



(Plate I, Fig. 2.) 

 Sinea coronata Stal, Stett. Ent, Zeit, XXIII, 1862, p. 444 ; WALKER, Cat. Hem. 



in Brit. Mus., V^II, 1873, P- 138, 9 ; Uhler, Bull. U. S. Geo!. Si. Geog. Surv. 



No. 5, 2nd Ser. 1876, p. 61 ; Uhler, Check List Hem., 1886, p. 23 ; Leth. 



& Severin, Cat. Hem., Ill, 1896, p. 199; Champion, Biol. Cent. Amer. 



Rhync, II, 1899, p. 292. 



Length, 13-15 mm. Anterior prothoracic lobe without spines on the disk, 

 furnished only with conical tubercles. Posterior lobe unarmed, bigibbous on the disk. 

 Abdomen of both se.\es abruptly widened behind. 



Habitat: United States, Mexico and Central America. Types, 

 Mus. Holm and Coll. Sign. 



This characteristic species is readily distinguished from all others 

 by the abruptly widened abdomen in both sexes, as illustrated at fig. 

 2 on plate I. Diadema is its nearest ally, and from it it is distin- 

 guished at a glance by the anterior prothoracic lobe being without 

 spines on the disk. It occurs in the southern and western United 

 States, the specimens in the National Museum being from Texas. 



Sinea complexa Caudell. 



(Plate I, Fig. 3. ) 

 Sinea conplexa Caudell, Can. Ent., XXXII, p. 67, 1900. 



Length 8-1 1 mm. Anterior prothoracic lobe distinctly spined. Posterior lobe 

 with well-defined spines on the disk, which is transversly convex, not bigibbous. 

 Abdomen with well-rounded sides, margins entire. Anterior femora with the last two 

 ventral spines of the inner row out of alignment, the terminal one the more so, being 

 sub-dorsally located. 



Habitat : This is a western species described from California and 

 also collected in Arizona. A specimen in the collection of the 

 National Museum is labelled ''Alabama," probably erroneously so. 

 Type no. 4433, U. S. Nat. Mus. 



This well-marked little species is at a glance recognized from all the 

 other species, integra alone excepted, by the posterior prothoracic lobe 



