6 MISC. PUBLICATION 241, U. S. DEPT. OF AGRICULTURE 
KEY TO THE GENERA OF EUPHORINAE—Continued 
3. Medius well developed throughout its length_______________________. 
Medius obsolete or very weak, at least toward base_________________-_ 
4, First cubital and first discoidal cells distinctly separated_____________-_ 
* Kirst cubital and first discoidalicellstconfluent=s0 9. 5. eee 
5. Thorax depressed, broader than high; recurrent vein, nervellus, and sub- 
costella lacking; medius arcuate; antennae 14-segmented; eyes of fe- 
male densely hairy 2e 4 sie. es 2 ae Cryptoxilos Viereck, p. 9. 
Thorax not depressed; recurrent vein, nervellus, and subcostella distinct; 
medius Straight; eyesmmot nary =e) es SO en LE ee 6 
6. Inner calcarium of posterior tibia half as long as metatarsus; frons un- 
usually short; antennae inserted near level of upper eye margins; 
TOG ULL eye kat ete ee ce ee Centistina Enderlein, p. 10. 
Inner calcarium of posterior tibia much less than half as long as meta- 
tarsus; frons normal; antennae inserted near level of middle of eyes; 
notauliusually dishnetiwsoed. 2 ee Aetisn ys oe. pie ee ee eee 7 
7. Female antennae very short, clavate, and geniculate; scape and first 
flagellar segment much lengthened; male unknown 
Eustalocerus Foerster, p. 10. 
Antennae long and slender, neither clavate nor geniculate 
Perilitus Nees, p. 11. 
8. Scape unusually long, at least nearly as long as height of head, often much 
OTL CTs Sk GB ay ihe he EE ee de gl Ah Pa Streblocera Westwood, p. 13. 
Scape very short, never more than twice as long as thick 
Microctonus Wesmael, p. 14. 
9. First abdominal segment unusually long and slender, about twice as long 
as posterior coxa and trochanter combined, thickest at middle, not 
CO OV > 
Carina tetatysides™ wy tee bn tee end Wesmaelia Foerster, p. 20. 
Kirstyabdominal segment notias abovece 2.) 200i 7 ee 10 
10. Radial cell large, nearly attaining apex of wing; first cubital and first 
discoidal cells confluent; ovipositor exserted_____.___..__._-----—- il 
Radial cell very short, its apex far from apex of wing; very rarely radial 
cell lacking; first cubital and first discoidal cells usually separated; 
ovipositorconcealed/or subexserted 21/4 Eee |e pa ys eae 12 
11. Abdomen very strongly compressed; tarsal claws simple; submediellan 
cell complete; propodeal spiracles at or behind the middle; head 
broad, more or less triangular when viewed from in front; temples 
flat, receding; legs long and slender, posterior coxae as long as 
propodeum; scutellum more or less conical 
Mytocephalus Marshall, p. 21. 
Abdomen not unusually compressed; tarsal claws distinctly cleft; sub- 
mediellan cell open, submediella lacking and nervellus incomplete; 
temples convex; posterior coxae shorter than propodeum; scutellum 
only shehthyseonvex: a2 eee epee Syntretus Foerster, p. 22. 
12. Radius and nervellus lacking; subcostella incomplete 
Euphoriella Ashmead, p. 25. 
Radius distinct; nervellus rarely absent; subcostella complete__________- 13 
13. Cubitus, intercubiti, discoideus, and recurrent vein effaced 
Euphoriana Gahan, p. 27. 
Cubitus distinct, at least at base, the first cubital and first discoidal cells 
separated; recurrent vein rarely absent ____-__ Euphorus Nees, p. 28. 
The Genus ARIDELUS Marshall 
Aridelus Marshall, Ent. Soe. London Trans. 1887: 66. (Genotype, Aridelus 
bucephalus Marshall.) 
Helorimorpha Schmiedeknecht, Die Hymenopteren Mitteleuropas . . ., p. 523, 
1907; Muesebeck, U. S. Natl. Mus. Proce. 79 (art. 16): 18, 1931. (Genotype, 
Helorimorpha egregia Schmiedeknecht.). (New synonymy.) 
Stictometeorus Cameron, Soc. Ent. 24: 9, 1909. (Genotype, Stictometeorus rufus 
Cameron.) (New synonymy.) 
Erythrometeorus Cameron, Timehri Jour. Roy. Agr. Comm. Soc. Brit. Guiana (3) 
1: 317, 1911. (Genotype, Erythrometeorus reticulatus Cameron.) (New 
synonymy.) 
Scipolabia Enderlein, Arch. Naturgesch. (Abt. A) 84 (10): 220, 1918. (Genotype, 
Scipolabia reticulata Enderlein.) (New synonymy.) 
Marshall’s description of Aridelus fits Helorimorpha exactly except 
in two respects. He says that the first cubital and the first discoidal 
