18 Illinois State Laboratory of Natural History. 



Beneath black, marked, as the head and thorax above, with fine 

 yellow spots. 



This species is not so widely and commonly distributed as 

 the preceding, but often occurs in considerable numbers. 



Genus 2. Aulaoizes Am. & Seev. 



Aulacizes Am. & Serv., Hemip. p. 571 (1843). 



Size and general appearance of Oncometopia. Head with 

 less prominent eyes, hardly wider than the thorax; ocelli situ- 

 ated on a nodule which springs from a cavity on the vertex, 

 nearer the eyes than to each other. Vertex flat, having, in ad- 

 dition to the broad shallow pits in which the ocellar nodules rest, 

 three deep, broad sulcations, oue larger and median, and the other 

 two situated one on either side between the eye and the ocellus. 

 The front is but little reflexed over the front margin on to the 

 top of the head. It is very convex below. The clypeus is slightly 

 convex. The gulae extend forwards and outwards, being slightly 

 arched and somewhat enlarged at the tip. The basal joints of 

 the antennae are also peculiarly enlarged at the tip. Pronotum 

 with its sides inflexed, surface irregularly wrinkled by trans- 

 verse striations formed of coarse punctures. Scutellum smal- 

 ler than usual, transversely striate, and not so distinctly sepa- 

 rated into an anterior and posterior portion. Behind, it is pro- 

 longed into a spinous process. Beneath, the coxa? are very 

 large, and the mesothoracic episterna are large and flat. The 

 venation of the elytra is very variable. The figure shows one 

 form. The cells are irregular both in size and position. There 

 are two cells in the clavum. The wings are much more con- 

 stant. The first sector gives off a marginal fork, and a cross-vein 

 connects the })()sterior fork of the first sector with the anterior 

 fork of the second. The second sector forks so near the tip 

 that the cross-vein connecting its posterior fork to the third 

 simple sector is extremely long. Fourth and fifth sectors 

 forked. Marginal vein not attaining the margin till near the 

 sixth simple sector. Abdomen with six segments in the fe- 

 male, seven in the male. 



A single species represents this genus in our fauna. 



