388 NOTES ON GEOPHILID^ — COOK AND COLLINS. 



Meinert and Latzel have both figured this species, but their diagrams 

 show some very noticeable differences. The labrum in our specimens 

 resembles Latzel's figure much more than that of Meinert, but the 

 teeth are proportionally shorter, and the exterior ones are slender and 

 appressed to the edge of the labrum. 



The teeth of the dentate lamella of the mandible differ from those of 

 Latzel's diagram in being of the same structure as their common base, 

 and in tapering slightly toward a broad rounded apex; the arrange- 

 ment of the teeth is more like that of Meinert's figure, but the teeth are 

 not !^o sharp pointed, and this diagram does not represent the common 

 base of the teeth as distinct from the mandibulary stipe. 



In 1872 narger* described GeopMlus gracilis as follows: 



Very light orange, head much darker , slender, siiiall. Cephalic segment nearly 

 quadrate. Antennae hairy, filiform, joints short obconic. Mandibles unarmed. Scuto- 

 episcutal sutures distinct posteriorly. Feet pilose, 39 or 41 pairs, occasionally 40, last 

 pair thickened and elongated. Sterno-episternal sutures distinct. Body slightly 

 hairy throughout. Length, 15 railimeters. 



This species is not uucoramou under stones and rubbish in moist places about New 

 Haven. 



This description agrees with the species under discussion except in 

 the character " mandibles unarmed." In 8. nemorensis the claw of the 

 prehensorial feet is armed, but the teeth vary greatly in size, and are 

 frequently so small and so close to the base of the claw as not to be 

 noticeable except on very close examination. 



As the species was "not uncommon" it is reasonable to suppose that 

 individuals of both sexes were under examination, but Schendyla is the 

 only genus known north of Mexico to which the character "last pair 

 of legs thickened" would apply in both sexes. That the number of 

 pairs of feet was "occasionally forty" also corroborates our view, in- 

 dicating both that several specimens were examined and that the ex- 

 amination was not so careful as to make it improbable that the tooth on 

 the claw of the prehensorial feet was overlooked. 



PECTINIUNGUIS Bollman. 

 Proc. U. S. Nat. Museum, xii, 212 (1889). 



Body depressed, narrowed posteriorly. 



AntennfB filiform. 



Frontal lamina coalesced ; cephalic lamina not covering the sides of 

 the, prehensorial feet ; prebasal lamina exposed; basal lamina broad, 

 its sides converging anteriorly. 



Labrum entire, united to the frontal lamina, deeply sinuate, me- 

 dianly dentate. 



Mandibles with one pectinate and three dentate lamellse. 



Labial sternum entire, coalesced with the maxillary sternum, a large 

 process attached to its exterior edge; interior labial process sharply 



' Am. Journal of Science and Arts, VI, 117. 



