THe Hymenoptera oF MINNESOTA 197 
BEY DA 
As in Diapriidae, but labial palpi with three joints. 
“An extensive and but slightly studied group closely related to the 
Diapriinae and formerly confused with them. . . . Nothing is 
known of the habits of the species 
comprising this group, altho Nees 
von Esenbeck and others believe they 
undergo their transformation within 
[the larvae of Diptera that inhabit 
fungi. From their close structural 
resemblance to the Protoctrypinae, 
this supposition is probably correct.” 
Ashmead on Belytinae—Bull. U. S. 
Nat. Mus. No. 45, p. 345, 1893. 
Tee achonie ctalrlavicnuda: Belyta fulva Cameron, is recorded 
UES. Nat Muss Bull: 45: from Bolitophila luminosa. 
J ACROPIESTA-~€aum 
SERPEIDAE 
Trochanters with two joints or stigma very short and broad. Antennae inserted 
on middle of face; wings present; wings may be absent; front wings when present 
with a more or less distinct stigma; mandibles without teeth; antennae with thir- 
teen joints. 
Serphus obsoletus Say is parasitic on Stelidota stugosa, having 
been reared from the latter insect by Professor Comstock. 
S. caudatus Say is widely distributed over the U. S. and prob- 
ably occurs in this state. 
S. clypeatus has been reared 
from a tree fungus from which 
Melandryid, Mycetophagid, Staphy- 
linid and Scaphidiid beetles were 
obtained. 
An _ unidentified Serphus was 
taken at Itasca Park, Sept. 1, by 
ie tes Va 
Pee © RMD ANE: 
Similar to Serphidae, but mandibles with 
teeth, and antennae with fourteen or fifteen 
joints. 
Members of the family are para- : 
: : Fig. 838. Helorus adoxr Provy., 
sites, typical of the group. zy Sema yl See a 
