SCUTATINA. 13 



FAMILY 2. ODONTOSCELIDJE. 



Head broad, short, rounded. Rostrum reaching to the second or 

 third pair of coxae ; rostral channel narrow in front, oval behind. 

 Antenna short. Eyes small, subreniform, or moderate and rounded. 

 Pronotum quadrangular, transverse, or nearly 6- sided. Scutellum 

 as long or nearly as long as the abdomen, and nearly as broad. 

 Prosternum with a deep rostral channel, which is/ sometimes con- 

 tinued on the meso- and metasternum, and recurved, forming a 

 channel for the antennae when at rest. Legs short, strong ; tibiae 

 with fine, short spines ; tarsi trimerous. 



Abdomen, Genital segments as in the Family Cydnidae, except that in 

 the ?, the junction of the plates of the first segment is ridged. Gen. 1, 

 Corimelcena. 



In the $ the angles of the first and second segments meet, and the 

 plates of the third segment press close together, closing the anal aperture. 

 Gen. 2, Odontoscelis. 



FAMILY 3. SCIOCOR1DJE. 



Head semi-ovate, broad, flat, the sides thin. Rostrum long, 

 slender, wide beyond the base ; rostral channel a little produced on 

 the sides. Antennae rather short, slender. Eyes small, rounded, 

 prominent. Pronotum quadrangular, transverse, the sides produced, 

 foliaceous. Scutellum more than half the length of the abdomen, 

 broad at the base ; apex narrower, but broadly rounded. Sternum with 

 a rostral channel. Legs short, strong ; tibiae with the outer side 

 flat, the margins dentate ; tarsi trimerous. 



Abdomen. Connexwum broad, horizontal. Genital segments : in the 

 the single segment is convex, with an oblique ridge at the sides ; in the 

 $, as in the Family Pentatomida, with this difference, that the plates of 

 the third segment are very small and short, are far removed from each 

 other, and do not reach the posterior margin of the second segment. 

 Gen. 1, Sciocoris. 



FAMILY 4 EURYGASTRID^E. 



Head triangular, rounded in front, broad, convex. Rostrum reaching 

 to the third pair of coxae ; rostral channel hindwardly very wide, with 

 the sides produced. Antennae very slender. Eyes small, triangular. 

 Pronotum very convex, hexagonal ; hinder sides short, hinder angles 



