4 MISC. PUBLICATION 241, U. S. DEPT. OF AGRICULTURE 
All other genera of the Euphorinae the habits of which are known 
are internal parasites of adults of Coleoptera, or of the nymphs or 
adults of Heteroptera. One of the best known forms is Perilitus 
coccinellae (Schrank), a cosmopolitan parasite of various species of 
Coccinellidae. Some other species of Perilitus attack Curculionidae; 
observations on the habits and biology of P. rutilis (Nees), a European 
parasite of species of Sitona, have been recorded by Jackson (8), 
who also has summarized the host relationships of certain related 
species. The only species of Cryptorilos Viereck the habits of which 
are known attacks adults of a species of Scolytidae. This is the 
type of host attacked also by the only species at present placed in 
the genus Hustalocerus Foerster, which is not known to occur in the 
United States. Considerable information is available concerning 
the habits of species of Microctonus Wesmael, next to Meteorus prob- 
ably the largest genus of the group. All the species appear to attack 
adults of Coleoptera. The common European species cerealium 
(Haliday) and aethiops (Nees) parasitize the clover weevils of the 
genus Sitona. M. brevicollis (Haliday) has been discussed in some 
detail by Kiinckel d’Herculais and Langlois (9) as a parasite of 
Haltica ampelophaga Guér., a flea beetle injurious to grapes in France. 
The European bicolor Wesmael and three species occurring in the 
United States, epitricis Viereck, vittata, new species, and pusillae, 
new species, also parasitize flea beetles that are injurious to crops; 
while eleodis Viereck, a rather common species in the Middle West, 
attacks adults of the false wireworms belonging to the tenebrionid 
genera Hleodes and Hmbaphion. Speyer (14) has published observa- 
tions on the parasitization of the weevil Ceutorrhynchus quadridens 
Panzer by M. melanoplus Ruthe; and recently Grandi (7) has dis- 
cussed morvmi Ferriere as a parasite of the cerambycid Morimus asper 
Sulz. Species of Microctonus that are parasitic in small hosts, such 
as the flea beetles, develop singly, only one maturing in a host; others, 
like eleodis and morimi, are gregarious, 124 individuals of the former 
having been recorded from a single female of Hleodes tricostata Say 
by McColloch (12, p. 221), and 121 from an adult of E. suturalis 
Say by Wade and St. George (15, p. 563). 
The single species of Aridelus Marshall of which the host associa- 
tions is known attacks nymphs and adults of a species of Pentatomidae, 
while the species of Huphorus Nees and Huphoriana Gahan appear 
to be parasites of Miridae. 
In all species of the genera mentioned as parasites of adult Coleop- 
tera the ovipositor is prominently exerted. On the other hand, those 
forms that are definitely known to parasitize Heteroptera have very 
short, usually subexserted, ovipositors. 
SYNONYMY OF THE SUBFAMILY EUPHORINAE 
Bp iomdee Foerster, Verhandl. Naturh. Ver. Preuss. Rheinlande 19 (N. F. 9): 
250, 1862. 
Perilitoidae Foerster, Verhandl. Naturh. Ver. Preuss. Rheinlande 19 (N. F. 9): 
53, 1862. 
Euphorides Marshall, Ent. Soc. London Trans. 1887: 51. 
Meteorides Marshall, Ent. Soc. London Trans. 1887: 87. 
Euphorinae Cresson, Synopsis of the families and genera of the Hymenoptera of 
America, north ‘of Mexico . . . p. 60, 1887; Ashmead, U. 8. Natl. Mus. Proc. 
23: 115, 1900; Szepligeti, Hymenoptera, Fam. Braconidae, in Wytsman, Genera 
Insectorum, fasc. 22, p. 167, 1904. 
