868 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvl 



are known maj^ be separated by the following table, which is based 

 wholl}' upon the characters of that sex: 



a. Seventh abdominal segment distinctly inflated on the posterior half. 



h. Long and slender, length about 60 nun hanksii, new species. 



bb. Shorter and less slender, length about 40 mm truncata, new species. 



aa. Seventh abdominal segment not inflated stramineus Scudder. 



PSEUDOSERMYLE ARBUSCULA Rehn. 



Sermyle arbuscula Heun, Can. Ent., XXXIV, 1902, p. 273. 



The following description of this species is taken in full from the 

 author's article referred to above: 



Type, female, San Diego, California, May 7, 1901. 



This species does not seem to be very closely related to any of the previously 

 known species of the genus. From azteca Saussure, it is differentiated by having the 

 femora carinate and striate; from saussurii Stal, by the nonampliate sixth abdominal 

 segment; and from strigata Scudder, by the more robust limbs and the less strongly 

 striate body. With mexicana and linearis Saussure, no affinity exists. 



General form slender, the thoracic portion rather robust. Head rather elongate, 

 bearing two central longitudinal rugfie, which become obscure caudad, the whole 

 surface of the head rather tuberculate, the tubercles being longitudinally disposed; 

 eyes subspherical, slightly exerted; antenn?e longer than cephalic femora; the prox- 

 imal segment large and broad, with the distal section contracted, this segment over 

 twice as large in bulk as the next. Pronotum, mesonotum, and metanotum tuber- 

 culate, the tubercles resolving into longitudinal series, this being more apparent on 

 the metanotum, the mesonotum and metanotum being centrally carinate; pronotum 

 rather narrow, not quite equaling the head in length; mesonotum long (with pro- 

 notum equaling the cephalic femora), the lateral margins slightly tuberculate; meta- 

 notum very considerable shorter than the mesonotum, comparatively robust, 

 expanding in the caudal portion. Abdomen rather slender, multistrigate, none of the 

 segments exhibiting any special ampliation; ventral surface between the sixth and 

 seventh segments exhibiting a pair of flattened longitudinal processes. Cephalic 

 femora heavy, with the proximal diastema (found in many representatives of this 

 family) rather well marked, the remaining section of the segment being inflated and 

 with three prominent angles; tibia^ as long as the femora, quadrate slightly taper- 

 ing; first tarsal joint about as long as the succeeding ones. Intermediate femora 

 short, triangular in section, equaling the metanotum (and median segment) in 

 length; tiljia- depressed, about equaling the femora in length; first tarsal joint con- 

 siderably less than the succeeding joints in length. Caudal femora short, reaching 

 the middle of the third abdominal segment, roughly triangular in section; tibia' 

 rather longer, reaching to the apex of the first segment. General color, reddish 

 brown, w^ashe^l with ashy gray on the cephalic limbs. 



3fe(tKiir<')m'n(s. 



mm. 

 Length of body 54 



Length of pronotum 3 



Length of mesonotum ^ 12 



Length of metanotum (with median segment) 8. 7 



Length of abdomen 28 



Lerigth of cei)halic femora 14 



Length of intermediale femora 7. 5 



Length of caudal femora 37 



