HEMIPTERA OF LOWER CALIFORNIA. 277 



trum broad at base, the basal joint remote from the throat 

 and scarcely extending beyond the middle of the throat, 

 remaining joints very slender, not extending beyond the 

 posterior coxae ; the throat deep and the upper cheeks 

 long and triangular. Pronotum curved upwards, sub- 

 cylindrical, but swollen on the middle and much contracted 

 behind this swelling, the middle of posterior margin ver}' 

 prominently reflexed-folded, so as to leave an acute notch 

 there, surmounted by a thick spine. Hemielytra begin- 

 ning very narrow, gradually widening posteriorly and 

 finishing in a bluntly rounded tip, coriaceous, closely 

 pubescent, with the basal vein gradually spreading away 

 from the costal as it proceeds backwards. Legs long and 

 rather stout. The abdomen inflated beyond the con- 

 tracted base. 



Myrmecopsis inflatus n. sp. 



Formiciform, piceous-black, dull, not apparently punc- 

 tate. Head long and thick, subconical at lower end; 

 antennce rufo-fulvous, blackish on the apical third of the 

 second joint. Rostrum reaching to the posterior coxa?, 

 piceous at base and tip. Pronotum blackish-piceous, 

 tinged with rufo-castaneous beneath and in front, medial 

 hump curving diagonally upwards and forwards, the de- 

 pression behind it deep and the flexure of the posterior 

 border almost abrupt, the posterior edge white, with the 

 spine black. Legs dull rufo-castaneous, with the femora 

 somewhat darker. Hemielytra velvety blackish-brown, 

 pale lead-color at base and along the inner border, the 

 membrane pale, with an ivorj^-yellow border at base. 

 Venter piceous-black, with a large angular white patch at 

 base. 



Length to end of venter 6 mm. Width of base of pro- 

 notum I mm. 



This wonderful insect deserves to be studied to dis- 



