i4^ DAVENPORT ACADEMY OF NATURAL SCIENCES. 



than the head and pronotum. The pronotum has the disk nearly 

 plain, with all the carinas, but especially the median, distinct. This 

 is cut by the transverse sulcus very little behind the middle. The lat- 

 eral carinae are very strongly sinuate and upon the metazone divergent. 

 They are cut plainly by the principal sulcus. The metazone has its 

 posterior margin roundly angulate. The lateral lobes of the pronotum 

 are higher than long with the anterior margin slightly oblique, the 

 posterior perpendicular and the lower arcuate. The anterior corner 

 of the lateral lobes is evenly rounded, the posterior angulate with a 

 rounded apex. There is on the anterior part of the lateral lobes a 

 heavy carina which extends from the middle sulcus forward and a lit- 

 tle downward to near the middle of the anterior margin. The meso- 

 sternal lobes are separated by a narrow space several times as broad as 

 long, and the metasternal lobes by a narrow space not more than twice 

 (male) or three or four times (female) as long as broad. The tegmina 

 are a little shorter (female) or a little longer (male) than the abdomen. 

 They have the scapular area much expanded in the male so as to make 

 the anterior margin strongly arcuate. The discoidal and ulnar areas 

 are frequently imperfectly closed, and the former has an irregular 

 intercalary vein. The posterior femora are banded above and on the 

 outer face. The posterior tibiae are reddish with the apical spurs on 

 the inner side not very unequal in length. The valves of the ovipos- 

 itor are very moderately exerted. 



Phlihostroma, Scud., 1875. Cent. Orth., 28. 



In part, Stenoboflirus, Thos., 1873. Syn. N. Am. Acrid., 93. 



Beta, Brunner, 1893. Rev. Sys. Orth ,121. 



The genus is represented by a single variable species. 



I. PhLIBOSTROMA yUADRIMACULATA, ThoS. FigS. 19a, 19b. 



Stenobothrus quadrimacalatus, Thos., 187 1. Prelim. Rept. U. S. 

 Geol. Surv. Wyo., 280. 



Stenobothrus qiiadrimacti lata s, Thos., 1872. Prelim. Rept. U. S. 

 Geol. Surv. Mont., 430. 



Stenobothrus quadriniaculatus, Thos., 1873. Syn. N.Am. Acrid., 93. 



Stenobothrus quadriniaculatus, Bruner, 1883. 3rd Rept. U. S. Ent. 

 Com., 56. 



Stenobothrus quadrimaculatus, Bruner, 1885. Rept. Com. Agr., 1885, 



307- 



Phlibostroma quadrwiaculata , Bruner, 1885. Bui. Wash. Col. Lab. 



Nat. Hist., I, No. 4, 135. 



