246 CRYPTOCEPHALINARUM BOREALI-AMERICAE DIAGNOSES. 



tt. Pygidio toto flavo ; pectore utrinque flavo-guttato. Pachyhrachis decoraius}^'De]. ^ 



445. 



(5. Pronoto sparsim punctato, maculis discoidalibus nullis, pectore immaculato. 



Variety |3 is allied to the type, and differs chiefly in the coarser punctures upon 

 the pronotum and apex of the elytra. 



Griburius is a latinized form of the French name for Cryptocephalus, (gribouri) and 

 although it was perhaps not intended as a permanent name by Dr. LeConte, I have 

 no hesitation in adopting it, as it will give two forms under one vernacular name. 



BASS ARE US Hald. 



2. C. CLATHRATUS Mels. Pr. Acad. 3,173. Saturate rufus, capite flavo-variegato, 

 thorace subtiliter punctato, flavo-marginato, maculis 2 basalibus flavis; elytris 

 profunde striato-punctatis, nigro-brunneis, guttis pluribus in fasciis 3 ordinatis, 

 apiceque flavis : antennis apice tibiis tarsisque fuscis : pygidio grosse equaliter 

 punctato. Long. 2 lin. 



a. Capite thorace pedibusque laete rufis. 



^ Prosternum with an erect compressed spine between the coxae : a large lunate 

 yellow plate between the posterior coxae, with the extremities projecting and forming 

 an acute spine ; abdomen with a large shallow smooth impression ; sides bounded 

 laterally and posteriorly by an acute margin, posterior to which projects a small 

 tooth ; ? without these appendages, but provided with a deep fovea upon the last 

 ventral segment. Pensylvania and Carolina. 



3. C. coNGESTUS F. 2,47 :34. Dejean regarded the preceding insect as this 

 species, but I have no means of ascertaining the accuracy of his determination. = 

 C. 3rwwmpe5|01iv. ? 



CRYPTOCEPHALUS Geoff. 

 ~ l,punctato-striati, pronoto laevissimo vel punctulato. 



^. Elytris flavo-guttatis. 



B. Elytris nigro-guttatis. 



(I. Thorace nigro, flavo-lineato. 



b. Thorace vel maculate vel immaculato, non lineato, prosterno postice emarginato, lobis acutis. 



C. Elytris vittatis. 



a. Elytro singulo vittis 2 plus minusve distinctis. 



b. Elytro singulo margine vittisque duabus flavis apice coeuntibus, his nonnunquam evanescentibus. 



D. Prosterno postice vix emarginato, thorace nigro, vel maculate vel immaculato, elytris flavis. 



E. Elytris rufo-maculatis. 



F. Metallici. 



■ir 2, disperse punctati, thorace punctatissimo. 

 G — a. Elytris disperse punctatis. 

 G — b. Elytris striato-punctatis 



