234 JAMES WATERSTON. 



would involve using a number instead of the terms " propodeon " and " sheath of the 



ovipositor," which seems a needless simplification. The measurements of the tarsal 



joints are made along the dorsal edge and do not include the claw. By " marginal 



vein " unless otherwise indicated, is to be understood strictly the costal portion or 



abscissa of that vein. 



Family ENCYRTIDAE. 



The present classification of the Encyrtidae according to the number of mandibular 

 teeth is entirely artificial, and, if pressed, puts members of the same genus into different 

 tribes. In tridentate groups species occur with the upper pair of teeth fused into one 

 broad cutting edge. There are described below two such species, which are formally 

 Ectromines, but I believe that their Bothriothoracine appearance is a truer index of 

 their relationship. 



These insects run down tosPentelicus, Howard (Proc. U.S. Nat. Mus., xvii, p. 611', 

 1895) in Ashmead's table (ibid., xxii, p. 336, 1900) if one begins at the Mirine section. 

 In the Ectromine section of Mr. Girault's keys (Mem. Queensl. Mus., iv, p. 181, 1915) 

 they run to Coccidoxenus, Crawf. (1913). Proofs of figs. 2 and 3 were sent to Dr. 

 L. 0. Howard, whose reply has fortunately come to hand just before the present 

 paper went to press. Dr. Howard writes that Mr. Girault considers that the drawings 

 indicate Coccidoxenus, Crawf., but with a more pronounced sculpture than has yet 

 been found in that genus. Pentelicus, How., he adds, is apparently the same as 

 Hemaenasius, Ashm. (Proc. U.S.A. Mus., xxii, pp. 336, 374, 1900)— the two difiering 

 however in sculpture— a genus with w^hich the African forms have no very close 

 relationship. It is in my opinion undesirable to erect even a subgenus on sculpture 

 alone, particularly in a section already probably overburdened with subdivisions, 

 and the species described below have therefore been placed in Coccidoxenus, Crawf. 



Genus Aneristus, How. 



Aneristus, Howard, Canadian Entom., xxvii, 1895, p. 351. 



Aneristus croconotus, sp. nov. (fig. 1). 



$. A blackish or blackish-broivn, dully shining species with a conspicuous yellow 

 notal blotch. 



Eyes dark chocolate-brown ; vertex (a little paler), frons and genae fuscous, with 

 black bristles. Antennae blackish brown. Thorax : prothorax entirely, meso- 

 pleurae, sternum and scutellum blackish brown ; anteriorly the mid lobe is narrowly 

 blackish where overlapped by the pronotum, and there is another presutural fuscous 

 or blackish band extending across the side lobes, except narrowly anteriorly. The 

 greater part of the mid lobe is bright lemon-yellow, which appears again linearly on 

 the broad petiole ; otherwise the metathorax, propodeon and abdomen are blackish, 

 the abdominal tergites having a purplish lustre. Fore wings : the submarginal and 

 marginal veins pale (to one-half), the latter apically darker ; the blotch extends 

 completely across the wing (fig. 1), which is very shortly darkened at the radix. Legs : 

 all the femora, the fore and mid coxae and tibiae, with their spurs, claws and empodia, 

 and first hind tarsal joint to beyond one-half, blackish ; fore and mid tarsus fuscous ; 

 hind tarsus mainly whitish. In the hind leg the coxa is pale laterally on both aspects, 



