HEMIPTEEA HETEROPTEEA LTGJEID^E. 403 



equal or almost equal to the last two together, these subequal. Thorax 

 transverse, usually only half as broad again as long, broadest at the base 

 or slightly before the base, narrowing in front so that the head is never 

 more than half as broad as the thorax, often with a slight triangular depres- 

 sion at apex, with no distinct posterior lobe. Legs, especially the femora, 

 x moderately stout. Hemelvtra with the corium reaching beyond the middle 

 of the abdomen, but not far. 



Four species have been distinguished in the Florissant shales. 



Table of the upeciei of Lithochromui. 



Thorax broadest at base ; first two joints of antenna; together as long as the last two. 



Thorax impnnctate or scarcely punctate, longer than the width of tlin huail ; coriurn of hemelytra 



obscure 1. L. gardneri. 



Thorax punctate, only as long as the width of the head, coriinn of hemelytra clear. 



Thorax more than one-half as long again as the head U. L. obflriclun. 



Thorax less than one-half as long again as (he head 1J. L. morluariim. 



Thorax broadest before the base; first two joints of antenuiB together slightly shorter than. the la.st 

 two 4. L. eitranru*. 



1. LlTHOCHEOMUS GARDN'ERI. 

 PI. 20, Fiji. K: PI. 27. Fig. 8. 



Antennae as long as the head, thorax, and half of the scutellum. 

 Thorax trapezoidal, longer than the width of the head, less than half as broad 

 again as long, the sides scarcely convex, the apex nearly five-sixths the 

 length of the base, the outer anterior angles a little rounded ; the front 

 transverse or slightly emarginate; a slight triangular depression broader 

 than long occupies the whole front margin: surface impunctate or scarcely 

 punctate, as is also the scutellum. Corium of the hemelytra obscure dark 

 fuscous, with pallid longitudinal strigne which scarcely affect the outer apex; 

 membrane showing faint, longitudinal, pale testaceous striga?. 



Length, 5 mm ; breadth, 2 mm . 



Named for Mr. James T. Gardner, geographer of the Ilayden Survey. 



Florissant. Seven specimens, Nos. 10!ii\ 2577, 3947, 4717, 1)837, 

 1007IJ, 14204. 



2. LlTHOCHROMUS ORSTRICTt'S. 



Thorax nearly twice as broad as long, only as long as the width of 

 the head, more than half as long again as the head : the sides pretty 

 strongly oblique and slightly convex : the apex about three-quarters the 

 length of the base; front margin regularly, broadly, and considerably 



