NATURAL SCIENCES OP PHILADELPHIAo 
85 
CoLASPis Fabr. 
C. humeralis, ovalis convexus, nigro-cupreus nitidus, capite thoraceque 
parcius punctatis elytris minus dense punotatis lineis dorsalibus utrinque dua- 
bus sublsevibns, intra humeros profunde breviter impressis, palpis antennisque 
basi testaceis. Long. "15. 
Texas, Mr. Haldeman ; one specimen. Resembles in form and size C. viridis 
Fabr., but differs by the thorax not being aciculate, but only sparsely punc- 
tured ; it differs from a species found in Georgia by the dark colored legs. The 
punctures of the elytra form irregular rows, but two intervals on each elytron 
are more obvious by their regularity ; the intra-humeral impression is deeper 
than usual. This species belongs to the division of the genus having the first 
joint of the tarsi not elongated, the claws with a broad basal process, and th<-) 
antenucB slightly thickened externally. 
Metachkoma Lec. (jChevr.) 
M. u s t u m , longiusculum, fusco-castaneum, nitidum, capite thoraceque par- 
cius punctatis, hoc latitudine duplo breviore, convexo, lateribus rotundatis 
marginatis, angulis parvis auriculatis, elytris thorace latioribus, antice leviter 
striato-punctatis, ad marginem et apicem indeterminate rufo-testaceis, ore 
capitisque maculis rufo-piceis, antennis pedibusque rufo-testaceis ; femoribus 
dente minuto armatis. Long. '22. 
Sonora, Dr. Webb. As large as M. inter r upturn ( Colaspis interrupta, 
Say), and resembling it in sculpture, except that the striae are more distant. 
The species to which I desire to restrict the name Metachroma, are those con- 
generic with Colaspis quercata Fabr., the first species mentioned in Dejean s 
Catalogue. They have the mouth free beneath, the thorax not lobed behind 
the eyes, which are large and prominent, the anterior coxse occupying nearly 
the whole of the presternum ; the antennae widely separated, slender, witii 
the joints 7-11 very slightly dilated, and the second and third equal. The 
femora are moderately incrassated, scarcely perceptibly dentate ; the posterior 
tibia are externally obliquely emarginate near the tip, and finally the ungues 
are acutely toothed or even bifid. 
M. suturale, piceo-nigrum nitidum, capite thoraceque parcius punctatis, 
thorace latitudine duplo breviore, medio convexo, lateribus subexplanatis valde 
rotundatis marginatis, angulis parvis auriculatis, elytris punctato-striatis 
thorace latioribus, rufo-testaceis, vitta lata communi suturali nigra, ore, an- 
tennis, tibiis ad apicem et basin, abdomineque ad apicem et latera piceo-rufis ; 
femoribus dente minuto armatis. Long. -24. 
Texas, Mr. Haldeman. Related to the preceding, but differs in the arrange- 
ment of the colors. As in it, the head is less punctured at the middle, and. 
has two vertical faint reddish spots. 
M. puncticolle, nigro-piceum, capite piceo-rufo, fronte punctata, oc- 
cipite obscuro, thorace transverso, lateribus rotundatis, angulis minutis auri- 
culatis, linea postica dorsali tenui Isevi, elytris testaceis striatim punctatis, 
punctis postice obliteratis, sutura usque ad dodrantem nigra antice iatiore 
antennis pedibusque testaceis, femoribus omnino muticis. Long. -17. 
One specimen from Fredericksburg, Texas, Mr. Haldeman. 
EuMOLPUs Fabr. 
E. cuprascens, oblongus convexus, cuprous vel aureo-cupreus, nitidus, 
fortiter subrugose punctatus, breviter fere erecte albo-pubescens, antennis ad, 
basin piceis, ore tibiis tarsisque nigris, elytris thorace latioribus. Long. -2. 
San Diego, California. Belongs to the same genus as E. s m a r a g d u 1 u s 
Zee, Pac. R. R. Survey, 9, (insects) 67, but differs from it by the color and 
more robust form. The generic characters are : thorax margined on the sides, 
lobed broadly behind the eyes, head not sculptured with lines, antenna:: 
slender ; femora and tibiae unarmed, ungues bifid. 
1858.] 
