March, 19 19.] McAtee : Berytim: (Heteroptera) . 81 



EE. Head with several strong spines ; veins of corium spinose ; ostiolar 



tubercle a short, curved, cylindrical process. 



F. Membrane of normal extent; juncture of marginal and terminal 



veins of corium far cephalad of end of abdomen ; veins of 



corium with a moderate number of fairly strong, curved 



spines; mesosternum conspicuously tumid. 



Saurocoris n. gen., p. 89. 

 FF. Membrane much reduced, juncture of marginal and terminal 

 veins of corium almost over end of abdomen ; membrane 

 forming an acuminate terminal appendage of elytron ; corium 

 expanded and inflated, its veins with a large number of long, 

 curved spines ; mesosternum not at all tumid. 



Acanthophysa, p. 90. 

 Aknisus new genus. 



The diagnostic characters are given in the key; further brief 

 description of the more characteristic features is given, however, as 

 in the case of all the other genera. 



Front of vertex with or without more or less pointed tubercles ; 

 thorax with distinct callosities, median line somewhat calloused and 

 elevated, sides very low carinate, and region within humeri elevated; 

 scutellum with short sharp almost upright spine; elytra delicate, hya- 

 line, very sparsely punctate; ostiolar process long, posteriorly curved 

 and twisted so that ostiolar canal, which channels it to apex, lies at 

 first on outer side but apically on its upper surface, apex without 

 spine; beak extending slightly beyond middle coxae; rostral sulcus, 

 scarcely evident on prosternum, fairly wide with rather swollen 

 margins (lacking indentations) on mesosternum, narrowed between 

 middle coxae, expanding on metasternum into a diamond shaped basin 

 with corresponding broad rounded margin, well marked and percur- 

 rent on first abdominal segment. 



The type of the genus is Aknisus calvus new species. I would 

 select Hoplinus multispinus Ashmead as genotype, because of its 

 being the earliest species, were not the standing of that name in 

 controversy. 



Key to the Species. 



Front of vertex with a short, but distinct pointed tubercle. 



multispinus Ashmead. 

 Front of vertex without pointed tubercle calvus n. sp. 



