Wasps of the Genus Tachytes. 
Black; the apical margins of the abdo- 
minal segments brown ......+..... T. observabilis, Kohl. 
9. Wings black, flushed with blue ; or dark 
PUBCO SM VALMRO: |. aay eye r Fes >» 10. 
Wings hyaline, subhyaline, or flavo- 
hyaline, sometimes pale fusco-hyaline 
BREN OA PAS O74 riche tice wind wie oi > Haters 13. 
10. Wings dark fusco-hyaline, abdomen with 
interrupted fasciz of silver pubes- 
GENCCte nari ee Fee Daas lacie eo ok T. merens, Turn. 
Wings black, flushed with blue or 
IMDM ae aise ain Anand a ha ial wie (ne 
11. Front and clypeus clothed with long 
GnGuE Mite saa) tewig'e es sheen sah oes T. nigropilosella, Cam. 
Front and clypeus with short sericeous 
PM SRONIS 0 ae faa cia'e sg Oe ais'C n Gace 4 12. 
12. Pubescence of front and clypeus silver ; 
anterior tibiz black ‘.............. T. natalensis, Sauss. 
Pubescence of front and clypeus golden; 
anterior tibie ferruginous.......... T. memnon, Turn. 
18, Abdomen black, without pubescent 
RABEME GS as Cd aa tain ay wa ALD Slo. haya. 4gae T. nudiventris, Turn. 
Abdomen with pubescent fascie ...... 
14, Abdomen densely covered with silver 
PRIMERCONCAY 1... 26.0 on acaeieo te tpee ds 15. 
The pubescence, if silver, restricted to 
the apical fascize on the dorsal seg- 
BUR otal do 9 ao chive Vad sla sha eraw WS ac Ee. 
15. Basal joint of fore tarsus with five 
SPINE wi os) masa Tiki Porer ee . I. distanti, Turn. 
Basal joint of fore tarsus with six spines. 16, 
16. Clypeus subtruncate at the apex; 
pygidial area clothed with golden 
BUD OSCONEHE ae io adie astae Ge apni dae vn T. argenteovestita, Cam. 
Clypeus rounded at the apex; pygidial 
area clothed with reddish brown 
BECHEN ctnentarapspandisherl at winter sie a4 ath Waka T. buluwayoensis, Bisch. 
17. Two basal abdominal segments at least 
PEO eWea s aunt: \ clavate 4.9 Fad Macoiaoyal a 18. 
Basal abdominal segments black ...... 19, 
18. Three basal abdominal segments red; 
clypeus without prominent teeth; 
apical slope of median segment closely 
transversely striated ......00.-.0.. T. sjostedti, Cam. 
Two basal abdominal segments red; 
clypeus with two prominent teeth; 
apical slope of the median segment 
closely and minutely punctured .... 7. ambidens, Kohl. 
Wings flavo - hyaline, fusco - hyaline 
apically from the second cubital cell ; 
pubescence of abdomen dense and 
golden; sparse golden pubescence on 
19 
. 
the sides of the mesonotum ........ T. dilaticornis, Turn. 
Wings, if flavo-hyaline, without a broad 
fusco-hyaline margin ...........+.. 20. 
20. Galea very long, more than twice as 
lO E AR THE SORPO cee aati hx ve ve a be 21; 
my 
