CERAMBYCID^E 335 



male, deep black throughout, except the ivory vittse, and very 

 coarsely, closely cribrate above, more coarsely on the pronotum 

 than on the elytra. 



Lophalia n. gen. 



In the typical forms, represented in my collection at present by 

 a pair of Sphenothecus qiiadrivittatus Bates, closely allied to cyani- 

 collis, the male is larger and has longer, more cuneiform elytra than 

 the female. In the following species this sexual difference is still 

 more accentuated : 



*Lophalia cribricollis Bates Male elongate, deep black throughout, 

 except the ivory vittse, which expand slightly beyond the carina, es- 

 pecially at base; pubescence everywhere extremely short and sparse, 

 rather close toward the sides of the abdomen and on the met-episterna 

 but not conspicuously; head densely punctate, the cleft between the 

 broad antennal tubercles abrupt and deep; antennae one-half longer than 

 the body, the third joint but little longer than four to ten, which are equal, 

 the eleventh sensibly longer, feebly appendiculate; prothorax fully a 

 fourth wider than long, the truncate apex but little narrower than the 

 base, the sides very obtusely subprominent just behind the middle; 

 surface very broadly flattened medially, becoming slightly concave 

 basally, not coarsely, deeply, very densely punctate, the median line 

 slightly impunctate anteriorly; elytra at base distinctly wider than the 

 prothorax, cuneiform, nearly three times as long as wide, rather coarsely, 

 very deeply and closely punctate but not densely, the line between the 

 two vittse somewhat swollen and impunctate along the middle; fifth 

 ventral truncate, but little longer than the fourth; prosternum densely 

 punctate; legs rather short, the hind femora far from attaining the elytral 

 tips. Length 16.5 mm.; width 4.2 mm. Mexico (Guerrero), Baron. 

 (Sphenothecus cribricollis Bates, Tr. Ent. Soc. Lond., 1892, p. 179]. 



The specimen that I assume to be a female of cribricollis, is 

 very much smaller, 11.5 mm. in length, parallel, with smaller head, 

 slightly shorter elytra and antennae about as long as the body, with 

 the third joint much longer than the fourth, the latter shorter than 

 five to eleven, which are of equal length; the coloration and sculp- 

 ture are exactly similar throughout. 



Zalophia n. gen. 



This genus is evidently allied to the preceding, but. the sides of the 

 prothorax, instead of being broadly angulate or feebly tumescent 

 submedially, have a small but abrupt median tubercle; besides this, 

 the dense erect bristling pubescence of the prothorax and antennae, 

 the latter being gradually much thickened toward base, serves to 



