1853.] 331 



in division C.,) although equally common, and less intimately related to the 

 other groups, have not, however, been commemorated by a generic name. 



Tegrodera Lee. was established on a single Californian species, differing 

 remarkably in appearance from all the other species known to me, and having 

 the claws of the tarsi apparently toothed instead of bifid. On close examination 

 I find that this apparent tooth is not a protuberance on the claw, as in Cysteo- 

 demus, but merely the ordinary inferior division of the claw, which is here 

 shorter and more intimately connected with the claw itself, the line of junction 

 being visible quite to the base of the claw. 



In consequence of the changes in classification, which are here proposed, I 

 give the following as the diagnosis of Lytta : 



Corpus prascipue alatum, elytris integris non imbricatis ; antennis ll-articu- 

 latis; unguiculis tarsorum non serratis, fissis, parte inferiore plerumque supe- 

 riori aequali; tarsorum articulo 4to non emarginato. 



A. Antennas apicem versus incrassato, articulo 2do breviore. 



A. Labrum subemarginatum. 



a. Tibiae posticae calcaribus duobus obtusis armatae . . Sp. 1. 



b. Tibiae posticae calcare altero cylindrico truncate, altero 



acuto .......... Sp. 2 6. 



c. Tibia? posticae cricare altero concavo^ altero acuto . Sn. 7 10. 



d. Tibiae posticae calcaribus duobus tenuibus subacutis . Sp. 17 18. 



B. Labrum valde emarginatum ...... Sp. 19 33. 



B. Antennae filiformes vel setaceae, articulo 2do breviore. 



e. Corpus glabrum, antennae laxae articulatas ; tib. post. 



calcare externo obtuso ...... Sp. 24 27. 



f. Corpus parce pilosum, calcaribus posticis subaequalibus . Sp. 28 30. 



g. Corpus pubescens, antennis laxe articulatis . . . Sp. 31 39. 

 h. Antennae articulatis arete coniunctis : 



* Ungues aequaliter fissi ...... Sp. 40 41. 



** Ungues parte inferiore minore ..... Sp^ 42 43. 



C. Antennae setaceae, articulo Imo valde elongato. 



i. Corpus apterum ........ Sp. 44 45. 



k. Corpus alatum ........ Sp. 45 52, 



A. a. 



1. L. v u 1 n e r a t a, nigra nitida, capite postice, thoracisque angulis lateralibus 

 acutis rubris, illo basi subemarginato macula occipitali nigro, elytris subtiliter 

 rugosis. Long -4 1-0. 



Cavtharis vrdnerata Le Conte, Ann. Lye. 5, 159. 



San Diego, September, abundant on a species of Baccharis. Black shining, 

 above glabrous. Head sparsely punctured in front, scarcely so behind, slightly 

 dilated behind the eyes, which are obliqup ; base subemarginate, posterior angles 

 rounded, with a large rufous spot reaching almost to the eyes, and fxtending 

 obliquely forwards meeting The opposite spot, so as to enclose a large occipitaK 

 black spot, which is slightly channf-led; clypeus and labrum punctured and pu- 

 bescent with erect black hairs. Antennae about as long as the head and thorax, 

 moderately thickened, with the external joints subglobular. Thorax scarcely 

 wider than the head, pentagonal, sparsely punctured, disc flattened, lateral angles 

 acute, marked with a large rufous spot. Elytra finely scabrous. Legs black, 

 intermediate tibiae curved; posterior tibiae armed with two broad spurs, which 

 are concave and obtuse at their apex. 



A. b. 



2. L. fulvipennis, nigra, nigro-pubescens, capite thoraceque rotundato 

 subtilius punctatis, illo puncto verticali rubro, elytris glabris opacis, fulvis dense 

 scabro-punctatis. Long. -70. 



Texas and Mexican Boundary Commission ; Col. J. D. Graham and Dr. 

 "Woodhouse. The antennae are incrassated externally, a little wider than the 

 head and thorax, with the outer joints subglobular; the thorax is somewhat 



