2 14 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



or one-third their length (male) beyond the abdomen. The posterior 

 tibife are light (female) or very obscure (male) red infuscated at the 

 apex. 



Described from one female and one male, the latter collected by Mr. 

 Coquillett at Los Angeles, the former bearing simply the lable "Califor- 

 nia." All the specimens are in the collection of the National Museum. 

 The male bears a very different appearance from the female with its 

 very dark, nearly black color, more sloping face, longer tegmina and 

 antennae and more slender form, but the structure of the head and 

 pronotum is exactly the same and I think that there is scarcely any 

 doubt but that they belong to the same species. 



VII. OPEIA, n. gen. Fig. 7. 



Vertex nearly horizontal shorter than the distance between the eyes, 

 convex, a little sulcate behind the prominent lateral cariucX which meet 

 at an angle of about 90 degrees. Median carina distinct. Lateral 

 foveolffi not visible from above, they are small sulci which extend from 

 the ocelli toward the vertex and are not clearly separated from the 

 front. The frontal costa is sulcate except at the apex, and its margins 

 are slightly and regularly expanded downward. Seen from the side, 

 the face is straight and strongly declivent. The antennae are considera 

 bly flattened basally and regularly acuminate, distinctly shorter than 

 the head and pronotum. The pronotum has the disk nearly plain, 

 being slightly elevated to the median carina. This and the lateral 

 carinae are unusually heavy and distinct and all three are cut by the 

 principal sulcus only much behind the middle. The lateral carinae 

 are very slightly divergent from the middle of the pronotum to the 

 posterior margin which is roundly angulate. The lateral lobes of the 

 pronotum are not cjuite so high as long; they are nearly perpendicular, 

 being veryslightly convex above, and they have a nearly horizontal carina 

 extending from the middle to the posterior margin. They have the 

 anterior and posterior borders strongly oblique with the lower margin 

 nearly straight. There is no prosternal tubercle. The mesosternal 

 lobes are separated (female) by a space about as long as wide, the meta- 

 sternal lobes by a space longer than wide (female) or nearly contiguous 

 (male). The tegmina are little shorter than the abdomen (female). 

 The discoidal area is occupied by a weak intercalary vein. The scap- 

 ular area is decidedly expanded in the male, and filled with a single 

 series of moderately strong curved cross veins. The posterior femora 



