LIBRARY

STREPSIPTERA 615
Polistes gallicus Linnreus in Europe and named Xenos vesparum Rossius. The
first free-living female and larvre were described by P. de Peyerimhoff in 1919
as Eoxenos laboulbenei. 1 It is one of the mengeids or free-living forms in which
the adult female is larviform as is the case in some female beetles. Since these
discoveries much additional information has been secured and a vast amount of
collecting and systematic work has been done. However, the keys are still very
imperfect in so far as the females and larvre are concerned.
The classification is modified from that of Pierce, Ulrich, and Bohart. I am
following many modern workers in substituting the term "primary larva" for
"triungulin. "
KEY TO FAMILIES - MALES
(After R. M. Bohart)
1. Tarsi five-segmented and with paired claws . MENGEIDlE p. 616
Tarsi with less than five segments and without claws 2
2. Tarsi four-segmented 3
Tarsi two- or three-segmented . . 5
3. Antenna: seven-segmented; segment IV short; V-VII very long
MYR.MECOLACIDlE p. 616
Antenna: with less than seven segments . . . . 4
4. Antennre five-segmented; segments III and IV laterally flabeUatej tarsal
segment I equals II-IV combined . CALLIPHARIXENIDlE p. 617
Antennre five-segmented; segment III only laterally flabellate; tarsal
segment I shorter than II-IV combined. . STYLOPIDlE p.617
5. Tarsi two-segmented; antennre fouf"segmented; segment III laterally
fiabellate, flabellum originating at base. . ELENCHIDE
Tarsi three-segmented; antennreseven-segmented ,HALWTOPHAGIDE p.617
KEY TO FAMILIES - FEMALES
(Modified from R. M. Bohart)
1. Adult free living. larviform. with legs, antenrue. and eyes . MENGEIDE p. 616
Adult partly endoparasitic, without legs, antenru.e, and eyes . . 2
2. Cephalothorax with hook-like projections behind the spiracles (parasitic
on TETTIGONIIDlE) . . STICB:OTREMATIDlE p. 618
Cephalothorax without hook-like projections.. ... 3
3. Cephalothorax greatly elongated; two pairs of spiracles; or with segments
of thorax distinct (parasitic on HEMIPTERA-RETEROP-
TERA) . CALLlPHARIXENIDAl: p. 617
Cephalothorax with a single pair of spiracles: thoracic segments completely
fused . . 4
4. Parasitic on HEMIPTER.1\-HOMOPTERA and GYRLLlDiE
HALICTOPHAGIDlE p. 617
Parasitic on HYMENOPTERA or FULGORID.£. . 5
1 They were in fact discovered by A. LaboulMne in France in 1870 and the species was
named for hi.l1.