252 CRYPTOCEPHALINARUM BOREALI-AMERICAE DIAGNOSES. 



18. C. GiBBicoLLis Hald. |Lec. Habitu omnino C. venusti, at major: pronotum 

 gibbosum, vix punctulatum, limbo semicirculari. Long. 3, lat. 2 lin. 



Closely allied to the preceding, but differs in the gibbous prothorax and greater 

 size. If, however, the former character is abnormal in the single individual observed, 

 it may be only a variety. Southern. 



19. C. INSERTUS Hald. Pallid e rufus, pronoto polito, punctulato, apice lateribusque 

 margine angusto flavo, basi vix maculato : elytris valde profunde seriatim punctatis, 

 margine angusto, vittisque 2 latis confluentibus confusis nigerrimis, tarsis nigris, 

 antennis apice fuscis. Long. 2 lin. 



o. Vittis distinctis. 



/3. Vitta exteriori evanescente. 



Head punctate, rufous, varied with flavous, apex (5 artic.) of antennae fuscous; 

 pronotum highly polished, minutely punctulate ; lateral and anterior margins, and 

 two indistinct oblique maculae, j^auow5 ; extreme margins black : scutel black, disk 

 indistinct flavous : elytra flavous, punctate in series, extreme margins and disc black 

 with two confluent vittae, leaving the exterior margin, apex, and a few streaks of 

 flavous (when the two vittae are normal, they correspond with those of the two 

 preceding species:) abdomen rufous, with silvery hairs, (three basal articulations 

 sometimes blackish ;) sternum flavous, pronotum slightly concave : tarsi black, 

 exterior side of the tibiae fuscous towards the apex, 



% with a plate extending over the posterior portion of the last ventral segment : 

 presternum with a posterior incisure, the lobes of which are acute. 



20. C. ALBICANS Hald. 4-l^ej. Cat., 447'. Laete rufus, pronoto vel obsolete 

 punctulato vel laevissimo ; apice, lateribus, maculisque 2 basalibus obliquis obsolete 

 flavis : elytris seriatim punctatis, sutura, margineque tenuissimo, vittisque 2 obscure 

 brunneis vel etiam nigris : tarsis fuscis. Long. 2| lin. 



o. Vitta unica subsuturali. 



13. Pallidus, vittis obsoletis, pronoto laevissimo. 



Front punctate, flavous or pale rufous ; antennae black, five basal articulations 

 flavous : pronotum polished, smooth or obsoletely punctulate, pale rufous or flavous ; 

 apex, lateral margins and two oblique basal maculae indistinctly flavous ; extreme 

 margins black, portion of the base covered by the elytra, serrulate : elytra flavous or 

 rufo-flavous, punctate in series, extreme margins bla'ck, interior vitta occupying the 

 space between the second and fourth striae, to which they are confined, the interstices 

 being scarcely discolored, the base of the fifth stria is slightly discolored ; second vitta 

 between the third and fourth exterior stria. Presternum % excised and toothed 

 behind : ? with a deep fovea on the last ventral segment. Southern. 



