548 PROCEEDINGS OF THE ACADEMY OF [June, 



Genus THAMNOSCIRTTJS Saussure. 



1878. Thamnoscirtus Saussure, Melanges Orthopt^rologiques, VI, p. 630, 

 fig. XLVI, No. 1. 



Included Phylloscirtus cicindeloides and vittatus Gerstaecker, of 

 which the former may be considered the type. 

 Thamnoscirtus cseruleusln. sp. 



Types: c5^ and 9 ; Guadalajara, Jahsco, Mexico. September 16 (c5^) 

 and 18 (?), 1903. (McClendon.) Acad. Nat. Sci. Phila. 



Allied to T. cicindeloides, but differing in the very distinctive colora- 

 tion, the larger eyes, the more compressed pronotum and a number of 

 minor characters. No close relationship exists with vittatus Ger- 

 staecker and montanus Saussure, while vindicator Saussure can be 

 readily separated by the coloration. 



cJ^. — Size medium; appearance cicindeliform as is usual in the genus. 

 Head trigonal, depressed, interocular region flat; eye subelliptical, 

 prominent, in greatest length almost equal to the interocular width. 

 Pronotum deplanate, somewhat constricted mesially, anterior margin 

 truncate with a slight median emargination, posterior margin truncate ; 

 central portion of disk with a distinct longitudinal impressed line which 

 fails to reach either the anterior or posterior margin; lateral lobes of 

 the pronotum with the inferior margin broadly arcuate. Tegmina 

 slightly shorter than the abdomen; axillary veins straighter and less 

 curved than in cicindeloides. Anterior tibiae with the tympanum on 

 the anterior face small and elongate-elliptical. Posterior femora mod- 

 erately inflated, slightly shorter than the tegmina. (The male indi- 

 vidual has been somewhat crushed and many structural features have 

 been damaged or changed to such an extent as to preclude any mention 

 of them.) 



9 . — Size medium; form as in the male, but slenderer. Head as in 

 the male. Pronotum as in the male except that the posterior portion 

 is not slightly broader than the anterior as in the male, and the median 

 impressed line is less distinct. Tegmina arched, slightly exceeding the 

 apex of the abdomen, subcoriaceous, apex acute; lateral field of the 

 tegmina apically truncato-emarginate and with but three instead of 

 six principal veins as in cicindeloides. Wings with the apical section 

 caudate but not projecting beyond the tegmina. Ovipositor shorter 

 than the posterior femora, moderately arcuate, rather broad and sub- 

 equal in width ; superior margin of the apical section with an oblique 

 truncation, apex finely serrulate above and below. Posterior femora 

 about two-thirds as long as the tegmina. 



General color very deep metallic blue in the male, deep metallic 



