13 ENTOMOLOGICAL NEWS [May, '2O 



Timema chumash 5 new species 



1903. Timema calif arnica Caudell, (in part not of Scudder, 1895), 

 Proc. U. S. Nat. Mus., XXVI, p. 883, pi. LVIII, fig. ya. [&, 9, Los 

 Angeles County, California.] 



Males of the present species agree closely with those of 

 T. californicum Scudder, except in the strikingly different 

 genitalia. In the female sex the genitalia likewise show 

 differences, which, however, are by no means as distinctive. 



The insect occurs in the mountains and adjacent regions 

 of southern California, far south of the known limits of 

 distribution of californicum. 



TYPE: of ; Los Angeles County, California. [Hebard Collec- 

 tion, Type No. 533.] 



Agrees closely with males of californicum, differing only in the more 

 robust structure and in the following genitalic features. 6 Penultimate 

 tergite produced dextro-distad more than sinistro-distad, in such a way 

 that the dextral margin is slightly more oblique to a medip-longitudinal 

 line than the sinistral margin; distal margin broadly convex to a small 

 but rather decided concave emargination, situated sinistro-mesad before 

 the base of the sinistral cercus, the brief portion of this margin above the 

 sinistral cersus straight, transverse, the surface of the plate toward the 

 internal portion of this section supplied with denticulations in a small 

 oval area. Sinistral cercus broad lanceolate with apex acute, lacking a 

 basal tooth but flattened proximo-internally, this portion with lateral 

 margin diverging and produced into a large acute-angulate projection 

 mesad, about half as large as the remaining distal portion of the shaft. 

 Dextral cercus a heavy, evenly in-bowed shaft of equal length, bifid distad 

 with internal portion of this section and larger than the external portion; 

 shaft bulbous proximo-externally. This cercus is much more like the 

 dextral cercus of californicum, differing principally in the bulbous proximo- 

 external section. Adjacent to and sinistrad of the dextral cercus is a 

 large, lamellate plate, extending caudad almost an equal distance, irregular 

 in contour and strongly constricted meso-distad, the dextral margin of 

 this plate being armed with well spaced, sharp, recurved teeth. Above 

 this plate is a very small irregularly rotundato-conical projection. 7 Me- 



5 The Chumash were an Indian tribe which, at the time of the Spanish 

 conquest, inhabited the region in which this species is found. 



6 Reference to text figure 2 is advisable, due to the high specialization 

 of these parts. 



7 In californicum the homologous projection is larger, more bulbous, 

 with apex produced dorsad in a small conical process, as shown in text 

 figure I. 



