CRYPTOCEPHALINARUM BOREALI-AMERICAE DIAGNOSES. 253 



C—b. 



21. C. AMATDS Hald. Supra flavus, pronoto lateribus obsolete punctulato, vittis 4 

 laete rufis : elytris profunde seriatim punctatis seriebits preparia approxiraatis, 

 interstitiis alternatim nigricantibus, subtus niger, prosterno nigro : pedibus rufis, 

 geiiubus flavis. Long. If lin. 



Head punctulate, flavous, with an A-formed rufous mark from the vertex to the 

 antennae : cljpeujs punctate, margined with rufous ; antennae fuscous, five basal 

 articulations pale rufous : pronotum polished, scarcel)' punctulate, flavous, with four 

 wide rufous vittae sub-abbreviated anteriorly, the exterior one with a short medial 

 transverse line ; extreme margin black posteriorly and rufous anteriorly : scutel black 

 disc flavous : elytra with impressed discolored punctures, in series, which are 

 arranged in pairs ; suture margin and base with a narrow line of black ; a black 

 widely interrupted vitta between the third and fourth rows of punctures ; a second 

 abbreviated anteriorly, between the fifth and sixth, and fifth and seventh posteriorly ; 

 the exterior vitta is between the seventh and ninth rows anteriorly, and eighth and 

 ninth posteriorly, and from the irregularity of the rows of punctures, it presents a 

 tendency to unite with the intermediate vitta ; beneath black, punctate, pygidium 

 and apex of the abdomen flavous with impressed discoloured punctures ; presternum 

 flavous, with an anterior spine tipped with black ; feet rufous, apex of the femora 

 flavous. Missouri Territory. 



% with an acute spine near the anterior margin of presternum ; presternum deeply 

 emarginate, angles subacute. 9 ? 



22. coNFLUENS Sai/. Am. ent. 2, pi. 28. Laete nifus, fronte punctata, linea 

 impressa ; antennis corpore vix longioribus : pronoto polito, subtiliter punctulato, 

 flavo-marginato, prosterno flavo, scutello nigro ; elytris flavis, seriatim punctatis, 

 sutura margine tenuissimo, lineis 3 nigerrimis : pygidio punctate : prosterno postice 

 valde emarginato. Long. 2 lin. 



Say describes the head and thorax as impunctured. The punctulations of the 

 pronotum are indistinct, and might not be observed. The antennae are dark fuscous, 

 five basal articulations rufous. In the ^ the last ventral segment is not foveolate, 

 and the base between the coxae is flavous : ? not observed. Missouri Territory. 



23. C. GEMINATUS NewM. 1840. Charlesw. mag. n. h. 4,250. Niger, capite 

 pronotoque laete rufis ; antennis nigris : elytris flavis profunde seriatim punctato- 

 striatis ; sutura late, margine tenuissimo, vittisque 2 nigerrimis ; interstitiis convexis. 

 Long. 2 lin. 



tt. Vittis 2 nigris dilatatis confluentibus. 

 3. Ano, pectore, femoribusque rufis. 



