CLARENCE E. MICKEL 427 



Related to drymocallidis Rohwer in the structure of the front 

 femora and other characters. 



Crabro (Solenius) planaris sp. nov. 



cf. Length G mm. Anterior margin of clypeus produced into a narrow, 

 truncated process, distinctly ridged medially; facial basin smooth, shining; 

 head with very strong, more or less confluent punctures, those on the cheeks 

 more shallow, smaller and sparser; line from anterior ocellus to facial basin 

 veiy faint; ocelli in a rather low triangle, the distance between the poste- 

 rior pair about equal to the distance between one of them and the nearest 

 eye margin; first joint of flagellum slightly shorter than the second; clypeus 

 and lower orbits covered with dense, silveiy pubescence; remainder of head 

 covered with sparse, silveiy pubescence, pronotum closely punctured, the 

 punctures smaller than those on the head, margined anteriorl}^ and dis- 

 tinctly dentate laterally; mesoscutum with large, deep, more or less conflu- 

 ent punctures; mesosdutellum sculptured similarly; episterna slightly striato- 

 punctate above, with fairly large, well separated punctures throughout; upper 

 and posterior faces of the propodeum strongly rugoso-reticulate throughout, 

 the sides of the propodeum strongly, trans verseh' striate; first abdominal tergite 

 basally much flattened, the flattened area bounded posteriorly by an obtuse 

 elevation; second abdominal tergite with a strong, transverse depression 

 basally; third abdominal tergite slightly depressed basally; abdominal tergites 

 with distinct, well separated punctures; second and third abdominal sternites 

 with a strongly impressed apical line; fore femora with a sharp tooth near 

 the base beneath; fore tarsi slightly flattened, intermediate tibiae not spined at 

 the tip. Color black; scape (except a fine behind), two very small, transverse 

 spots on the anterior face of the pronotum, posterior lobes of the pronotum, 

 narrow, medial, transverse bands widely interrupted medially on tergites one 

 to four, narrow sinuate bands on tergites five and six, anterior femora at the 

 tips and below, intermediate femora at the tips, anterior tibiae entirely, inter- 

 mediate and posterior tibiae except a line within, and all the tarsi, yellow; 

 flagellum above blackish, beneath testaceous; tegulae testaceous; wings sub- 

 hyaline, veins and stigma testaceous. 



9. Unknown. 



Type, a male collected at ^lonroe Canyon, Sioux County, 

 Nebraska, August 17, 1908, (R. W. Dawson). 



Distinct from the other species of Solenius in the flattened 

 area on the first abdominal tergite, the transverse, basal depres- 

 sions on tergites two and three, and the impressed, apical lines 

 on sternites two and three. 



Lindenius buccadentis sp. nov. 



190S. Lindenius armaticeps H. S. Smith, I'liiv. Xebr. Studies, viii, p. 404, 

 (nee Fox). 



9 . Length 4. ,5 to .5 mm. Clyi)eus truncate anteriorly with a lateral 

 tooth; facial basin smooth; line i)etween fore ocellus and facial basin distinct; 

 ocelli in a low triangle, the distance between the two posterior ocelli very much 



TRANS. AM. ENT. SOC, XLII. 



