1904.] NATURAL SCIENCES OF PHILADELPHIA. 545 



late with eerii-drab. Pronotum with the upper half of the lateral lobes 

 bistre; posterior margin of the lateral lobes narrowly blackish. Meso- 

 notum and metanotum with lateral blackish patches, more distinct 

 on the mesonotum. 



Measurements. 



Length of body, 37 mm. 



Length of pronotum, . 12.5 " 



Greatest width of disk of pronotum, 7.5 " 



Length of posterior femora, 37 " 



Length of ovipositor, 18 " 



A paratypic female has also been examined. 



Genus CEUTHOPHILUS Scudder. 

 1862. CeuthophUus Scudder, Boston Jour. Nat. Hist., VII, p. 4.33. 

 Included C. macidatus (Harr.), C. brevipes Scudd., C. lapidicola 

 (Burm.), C. uhleri Scudd., S. scahripes (Hald.), C. divergens, C. latens, 

 C. niger and C. calijornianus Scudd., C. stygius (Scudd.), C. agassizii 

 (Scudd.) and C. gracilipes (Hald.). The first of these, macidatus, may 

 be considered the type. 



Ceuthophilus macropus n. sp. 



Type: 9 ; Guadalajara, Jalisco, Mexico. September 14. 1903. 

 (Mcfclendon.) Acad. Nat. Sci. Phila. 



This new species is provisionally placed in CeuthophUus, but it is 

 possibly distinct, as the median coxse are not spined. It does not 

 appear to be closely related to any of the previously known species,, 

 though running to occultus and discolor in Scudder's key of the genus,, 

 to which, however, it is not closely related. 



Size medium; form compressed, elongate-fusiform. Head short and 

 broad; occiput sloping downward and forward; eye rather small, sub- 

 trigonal ; antennae about twice as long as the body. Pronotum arched 

 transversely; anterior and posterior margins truncate; lateral lobes 

 slightly longer than high, inferior margin very broadly and slightly 

 arcuate, angles rounded. Mesonotum and metanotum subequal in 

 lateral depth, extending below the inferior margin of the lateral lobes 

 of the pronotum. Abdomen compressed, surface smooth. Ovipositor 

 slightly longer than the pronotum, straight, tapering evenly from the 

 base to one-third the length from the apex, subequal in the apical 

 third; apex obliquely truncate, the superior margin with a prominent 

 rounded emargination which gives the extreme apex an almost needle- 

 like character; internal valves bearing five prominent spines on their 

 inferior margins. Anterior coxse unarmed; femora about one-fifth 

 35 



