Dictyophorinen. 209 



Described from twelve specimens from Colorado and Utah collected by 

 the author. 



2. O. erectus Ball. op. cit., pag. 202. 



Reseinbling minor but smaller and with a rounding front. Smoky 

 with the elytra paler. Length, 4 mm. 



Vertex small, acutely triangulär, but little in advance of the eyes and 

 exactet by the rounding front, lateral carinae distinct but not foliaceous. 

 Front broadest below the eyes, the median tablet elevated, narrow, not 

 reaching the Vertex from which it is separated by a polished area. As 

 seen from the side the front is slightly rounding and the apex of head 

 is bluntly rounded, almost truncate, two-thirds the width of an eye. Elytra 

 rather long, the reticulate venation distinct. Anal tube moderately long, 

 obliquely truncate on the lower portion slightly produced into a point 

 which does not curve around' the plates. Plates short, stout, appressed, 

 their apices curved upwards and inflated, together forming a curved club. 



Color. — Vertex pale straw, the lateral carinae against the eyes and 

 again before the apex faintly lined with brown. Front pale smoky, the 

 carinae of median tablet light, very faintly lined with dark and separated 

 by dark stripes. Pronotum and scutellum smoky, carinae and elevations 

 light. Elytra dirty straw. Abdominal segments smoky with irregulär dark 

 markings. 



Described from a single male from Kelso, California, collected by the 



author. 



3. O. compressus Ball. op. cit., pag. 202. 



Similar to erectus but slightly broader, with a longer, narrower and 

 slightly upturned cephalic process. Length, 4 mm. 



Vertex slender, anterior part elevated, acutely angular, with the apex 

 truncate. Front slender above, expanded below the eyes. The median 

 tablet narrow, elevated. As seen from the side, the front is almost straight, 

 slightly angled beneath the eyes and forms with the vertex a stout truncate 

 cephalic process as long as the width of an eye. As seen from above, 

 the cephalic process is much narrower than in erectus, the head is longer 

 and slenderer and the eyes less prominent. Anal tube in the male with 

 the lower portion spread out into a flat plate with the margins slightly 

 curving around the plates. Plates short and stout, together forming an 

 inflated. A short recurved tooth beyond the middle of the outer margin of 

 each plate. 



Color. — Greyish brown with the pustules on pronotum and some 

 nervures of the elytra light. Abdomen smoky, with a few irregulär light 

 lines. Vertex and front with dark lines as in erectus. 



Described from a simple pair from Helper, California, collected by 

 the author. 



Abhandl. der k. k. zool.-bot. Ges. Wien. VII. Bd., 1. Heft. 



