AMERICAN COLEOPTERA. 53 



from them and agrees with S. pctrnplujd, by the more opake and densely 

 ])unetured thorax, with larger conspicuous punctures intermixed ; it 

 differs from all by the elytra being more deeply concave and more nar- 

 rr.wly margined at the base. 



SCIRTES lUiger. 

 S. ruficollis. rotundato-ovalis, nia;ro-j)i<-eus nitidus, pmictulatiis subtiliter pu- 

 bescenSjCapite, thorace, macula elytroruin ovali comrnuni, antonnis pedihusque 

 rufo-testaceis: thoraee interdum macula apicali nigra. Long. 3 mm. 



Two specimens collected by Dr. Lewis south of the Raton Mountain ; 

 T have also seen specimens from Texas. This species agrees in size 

 form and sculpture with *S'. ccnfmlis, but differs by tlie head and thorax 

 being pale reddish-yellow, and by the discoidal spot of the elytra be- 

 ing much larger. 



PHOTINUS Lap. emeiid. Lac. 

 P. flavicollis, elongata, nigra, thoraee semicirculari, laete flavo, lateribus et 

 apice punetatis,3ubdiaphanis,discomedionitidolaevi caualiculato: elytris gra- 

 nulatis, margine late explanato, dorso utrinque linea elevata parum conspicua; 

 abdomine segmentis duobus ultimis pallidis, antepenultimo margine postico 

 ])allido. Long. 8'5 mm. . 



A very distinct and beautiful species found clinging to plants in the 

 neighborhood of the Purgatory canon and the Raton Mountain. It 

 seems to belong to the same section of the genus as P. nit/ricans, deci- 

 ■piens and fcnestralis, but differs from them by the last two segments of 

 the abdomen being pale, though they have not the appearance of being 

 luminiferous. 



NEMOGNATHA Illiger. 



N. sparsa, nigra, brevissinie pubeseens, capita, thoraee, seutello, abdomine 

 isegmentis duobus ultimis maris), femoribu-sque, (apice excepto),flavo-testaceis ; 

 eapite thoraceque grosse parce punctatis, hoc latitudine baud breviore, lateri- 

 bus antice rotundatis, postice subsinuatis, medio canalieulato; elytris sat dense 

 punctatis, thoraee sesqui latioribus; antennis nigris, articulo 3io praecedente 

 vix sesqui longiorej maxillis pallide piceis, dimidio corporis longioribus; ti- 

 biis posticis calcare exteriore lato obtuso, interiore angustiore subaeuto. Long. 

 t>-o mm. 



Mas abdomine nigro, apice flavo, segmento 6to profunde emarginato, 5U) apice 

 canalieulato. 



Femina abloniine flavo, segmento Bto emarginato, .5to couvexo, baud im- 

 ))resso. 



Several specimens found south of Raton Mountain. This species 

 differs from all those previously described by the characters above 

 given. 



