68 bulletin: museum of comparative zoology. 



Type.— No. 2242, M. C. Z., Florissant, Col. (No. 11,927, S. H. 

 Scudder Coll.). Other specimens in the Museum of Comparative 

 Zoology are:— Nos. 2243-2249, Florissant, Col. (Nos. 2138, 4795, 

 8086, 9043, 11,471, 14,974 and 14,983, S. H. Scudder Coll.). Professor 

 Cockerell also sent me a well-preserved specimen with reverse collected 

 at Station 17. 



There seems to be no representative of the tribe Ophionini at 

 Florissant, nor have any been discovered at Oeningen or Radoboj. 

 Serres ('29), however, has recorded the occurrence of Ophion in the 

 Lower Oligocene at Aix. 



No representative of the tribe Nototrachini has been found in the 

 fossil state. Its distinguishing character of a single tibial spur on the 

 middle leg is one that can scarcely ever be made out in the fossil, so 

 that its confusion with the preceding tribe must inevitably occur in 

 palaeontological work. 



In Europe the genus Anomalon has been recognized at two places, 

 one species described and figured by Heer ('49) from the Upper Miocene 

 at Oeningen as Anomalon protogaeum which very evidently belongs 

 to the Anomalini although its position in the genus Anomalon, s. str. 

 is not so certain, and Anomalon sp. by Serres at Aix in the Lower 

 Oligocene which its describer compares with A. variegatum, supposedly 

 a recent species, but one which I have not been able to locate. 



In the present collections from Florissant, there are six easily recog- 

 nized species of Anomalini, three belonging to Anomalon, one to 

 Barylypa, one to Exochilum, and still another to Labrorychus. 



Labrorychus latens, sp. now (Fig. 51.) 



Probably a female. Length 11.5 mm. Color apparently brownish or 

 rufous with the dorsal parts of the thorax darker. Wings hyaline ; head and 



thorax not particularly 

 well preserved, the meta- 

 thorax roughly rngose- 

 reticulate, rather gently 

 declivous behind. First 

 two segments of abdomen 

 long and slender, the 

 following much enlarged 

 Fig. 51. — Labrorychus latens, sp. nov. Type. and flattened and lighter 



in color than the basal 

 two. Wings short and broad, the stigma very slender, almost linear, but 

 distinct; piceous; veins light fuscous. Marginal cell long, gradually 



