164 DERMAPTERA AND ORTHOPTERA FROM SINALOA, MEXICO 



In the present series the majority have the head pale, many 

 with a broad band of brown between the ocelh, this expanding 

 in intensive examples and in the maximum intensification 

 shown the head is dark brown, except for the pale buffy occi- 

 put. The pronotal disk is buffy, often with a few microscoi)ic 

 dots of pale brown, these dots darker and more numerous in the 

 maximum intensive condition, but never conspicuous. 



Latiblattella picturata Hebard 



1921. Latiblattelln picturata Hebard, Trans. Amer. Ent. Sac, XLvn, p. 20:5, 

 pi. XIII, figs. 2 to 8. [cf, 9 : San Jorge, Sierra el Taste and San Jose del 

 Cabo, Baja California, Mexico; Venvidio, Sinaloa, Mexico.] 



Venvidio, VI, 16, 1918, 1 cf , 1 juv. &. 



This species, apparently nearest in relationship to L. zapoteca 

 (Saussure), belongs to that section of the genus including species 

 which are beautifully and strikingly marked. 



Xeoblattella sinaloae new species^ (Plate VI, figures 5 and 6.) 



This species, known only from the male sex, is a small and 

 inconspicuous type, which we place after A^. fratercula Hebard. 

 It does not appear, however, to show close affinity to any of 

 the species known to us. 



The tegmina are very slightly more coriaceous than in frater- 

 cula, with the numerous cross-veinlets so delicate and colorless 

 that they can not be seen by the naked eye. The subgenital plate 

 is distinctive, quadratic emarginate on each side, with heavy, 

 armed, similar cerci and median portion produced in a large, 

 symmetrical, unspecialized pentagonal patelliform projection. 



Type.— d'; Venvidio, Sinaloa, Mexico. July 20 to 22, 1918. 

 (J. A. Kusche.) [Hebard Collection, Type no. 758.] 



Size small for the genus, form moderately slender. Intcrocular space four- 

 fifths as wide as that between the antennal sockets; ocellar spots moderately 

 large and distinct. Maxillary palpi elongate, fifth joint three-quarters as 

 long as fourth, obliquely truncate in distal two-thirds, fourth joint nearly as 

 long as third. Pronotum weakly convex, greatest width meso-caudad. Teg- 

 mina and wings fully developed, extending well beyond cereal apices. Teg- 

 mina with (six) longitudinal discoidal sectors, cross-veinlets subobsolet(\ 

 except in area of dextral tegmen (-onccaled when at rest. Wings with (six) 

 costal veins rather heavily clubbed distad, ulnar vein with two branches, 

 intercalated t rianglc moderately well developed. Dorsal surface of abdomen 

 unspecialized. Supra-anal plate strongly transverse, very broadly and 



