THE CANADIAN ENTOMOLOGIST. 141 



NOTES ON SOME SOUTHERN CALIFORNIAN ORTHOPTERA. 



BY JAMES A. G. REHN, PHILADELPHIA. 



The following specimens were collected at San Diego. California, 

 during the year 1901 by Mr. G. W. Dunn, and are now in the collection 

 of the Academy of Natural Sciences of Philadelphia. The terms used in 

 the descriptions are those adopted by Comstock and Kellogg in their 

 recent work, " Elements of Insect Anatomy." 



Family MantidjE. 



LlTANEUTRIA OBSCURA. Scudder. 



One immature male, November 13, 1901. 



Family Phasmid^e. 

 Sermyle arbuscula,* n. sp. 



Type, $ ; 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 non ampliate 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 rugae, which become 

 obscure caudad, the whole surface of the head rather tuberculate, the 

 tubercles being longitudinally disposed ; eyes subspherical, slightly 

 exserted ; antennae longer than cephalic femora, the proximal segment 

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

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

 tuberculate, 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 equalling the head 

 in length ; mesonotum long (with pronotum equalling the cephalic 

 femora), the lateral margins slightly tuberculate; metanotum very 

 considerably shorter than the mesonotum, comparatively robust, expand- 

 ing 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 



'In relation to the twig like appearance of the insect. 



