202 HISTERIDA. 
19. Hister biplagiatus. 
Hister biplagiatus, Lec. Monogr. in Bost. Journ. Nat. Hist. v. p. 25, t. 3. fig. 4°; Mars. Monogr. 
in Ann. Soc. Ent. Fr. 1854, p. 552, t. 9. fig. 119°; Dej. Cat. 3rd edit. p. 141°. 
Hister binotatus, Latr. in litt. 
Hister instratus, Lec. Col. Kans. 1859, p. 7 *. 
Hab. Nortu America’, United States 12 4.—Mexico, Durango city (Hége). 
Two examples, captured in 1887. 
20. Hister patagiatus, sp.n. (Tab. V. fig. 13.) 
Oblongo-ovatus, convexus, niger, nitidus, subtus lateribus villosis; antennis piceis; fronte parce punctulata, 
stria semicirculari antice subinterrupta; pronoto stria interna ad oculos interrupta, externa brevissima ; 
elytris nigris, macula flavo-rubra arcuata, striis 1 -3™ dorsalibus integris, 4* et 5¢ ad apicem vix breviter 
notatis; propygidio ocellato-punctato; pygidio dense sat grosse punctato; prosterno lobo brevi, parce 
punctato; mesosterno stria antice parum interrupta; tibiis anticis dilatatis, 4-dentatis, posticis multi- 
spinosis. Long. 43 millim. 
Hab. Mexico, Acapulco (Hége). 
One example. This small insect pertains to the American section of the group to 
which #. sellatus, Lec., and H. lucanus, Horn, belong. Its specific differences lie 
chiefly in the thoracic and mesosternal strie and in the ocellated punctures of the 
propygidium. ‘The trapezoidal black spot on the elytra common to it and its congeners 
‘is so large that it reduces the arcuate, red or yellow, band to marginal limits. 
21. Hister coronatus. 
Hister coronatus, Mars. Monogr. in Ann. Soc. Ent. Fr. 1861, p. 545, t. 18. fig. 35°. 
Hab. Mexico, Cordova (Sallé1); Panama, Caldera in Chiriqui 1200 feet (Champion). 
Two examples from Cordova and one from the State of Panama. 
92. Hister politus, sp. n. 
Ovalis, convexus, niger, nitidus, politus; fronte impressa, subtiliter punctata, stria integra utrinque sinuata ; 
pronoto undique subtilissime punctulato, stria interna integra, externa dimidiata; elytris striis 1*-3™ 
integris, 4° basi rudimenta, 5* brevissima arcuata, suturali utrinque abbreviata; propygidio basi parce 
punctato; pygidio levi; prosterno haud striato; mesosterno leviter emarginato, stria integra; tibiis 
anticis obtuse tridentatis, posticis multispinosis. Long. 6-64 millim. 
Hab. Mexico, Temax in N. Yucatan (Gaumer). 
This species is very similar to H. coronatus, Mars. It differs in the minute punc- 
tuation of the head and thorax, the more transverse and but slightly bent frontal stria, 
and the much longer outer thoracic stria; the third elytral stria is usually complete, 
although in some specimens it is broken up into punctures at the apex. The chief 
distinction, however, lies in the pygidium, it being almost smooth though sometimes 
there are a few punctures at the basal angles; in H. coronatus the pygidium is thickly 
