AMERICAN COLEOPTERA. 37 



Amblyohila. — Eyes two. Antennae with joint two nearly equal 

 to all the others combined. Maxillary palpi with the first joint longest, 

 third shortest. 



Omus. — Eyes eight, two pairs large, two small. Antennae with the 

 first three joints equal, fourth shorter. Maxillary palpi with joints 

 one and three equal, second shorter. 



Tetracba. — Eyes as in Omus. Antennae with second joint longer 

 than the first and equal to the two following together. Maxillary 

 palpi with the second and third joints nearly equal, each slightly 

 longer than the first. 



CiCINDELA. — Eyes as in Omus. Antennae of Tetracha. Maxillary 

 palpi with joints gradually longer and more slender from the first to 

 the third. Fifth abdominal segment with the gibbosity emarginate 

 behind, each side with a long slender hook and a short acute tubercle 

 the latter directed posteriorly. 



In these genera the thorax becomes gradually broader and shorter 

 from Amhlyrhila to Cichidela. The mentum also varies in form but 

 this member is diificult to describe as its anterior portion, and usually 

 the sides are more or le:<s membranous and the form assumed might 

 be quite different to different observers. 



Dic9clu»$, sp. 



T am unable to say positively to which species the larva described 

 below belongs. I have before me three specimens one from Georgia 

 and two from Texas. The latter were sent in a bottle with D. splen- 

 didits and cosfafits so that it may belong to either. Recently Mr. F. 

 G. Schaupp of Brooklyn, has sent me a sketch of the larva of D. dila- 

 tatus (from which he succeeded in raising the imago), which agrees 

 in every particular with the three larvae before me. To Mr. Schaupp 

 belongs the credit of having determined the larva as I was rather 

 unwilling to t)elieve my larvae to be those of Dicselus, the small 

 size of the head influencing me in the belief that they were rather 

 Chlseii ius. 



Color dark greenish blue semiopaque, head reddish yellow. 



Form fusiform depressed narrower in front. Plate II, fig. 5, 

 5 a to 5 e. 



Head reddish yellow, corneous, not deeply inserted in the thorax, 

 above slightly concave, beneath slightly flattened, slightly narrowed 

 behind the insertion of antennae to base. Head above with anterior 

 margin emarginate at middle, on each side lobed over the mandibles 

 posterior to which is a slight emargiuation from which the antennae 



