308 Annals Entomological Society of America [Vol. VIII, 
KEY TO PACHYGASTERINAE WITH UNARMED SCUTELLUM. 
Lo sTiird vein simple. Ay recc.ceh Goce eos ee ee ore ee ia ee ee 2 
Third veinfurca ter, 05 52h Rep Reece seer sis ic ce a Tn a eee 3 
2. hirds(complex)iantennalsoimiveloncatesn) ink emus or rierameee Berkshiria 
Third antennal joint short, disclike or slightly reniform......... Zabrachia 
3. Arista subplumose, slender; third antennal joint round; eyes of male contiguous 
Lophoteles 
Arista densely or slightly pubescent, or bare, rarely slightly thickened; third 
antennal joint elongate or disclike; eyes of male contiguous or distinctly 
SOPAU ATE Cha tases cose Sears EN Ge et eae Ree AEE TOTO So 4 
4. Scutellum directed upward, triangular, terminating in a short obtuse process.5 
Scutelum regularly rounded apically, or with a distinct transverse suture or 
depression before the apex which gives to the scutellum the appearance of 
lnenigates eh inzHisiou ovo acatshacahats) Lambada hay eam as Wee cerainoncb ecco bmnS ned obese 6 
5. Third antennal joint disclike, arista longer than entire antenna; eyes of male 
TATHOWWesePArALedie: a he Welw chin ae eee ee Eucynipimor pha 
Third antennal joint elongated, arista shorter than antenna; eyes of male 
COMUISTIOUIS cin. Meena cae RGR is eit oe eno eee nee Cyntpimor pha* 
6. Third antennal joint elongate; eyes of male contiguous above antenna, the 
facets slightly decreasing in size as they near lower margin but without 
any sharp line of division; scutellum with distinct marginal rim or ridge... 
Johnsonomyia 
‘Rhordvantennals joint Gischike s,s ce. cit 8. seo ae eee rene eine anne 7 
7. Eyes of male contiguous; antenne in both sexes inserted distinctly below 
middie vos. profile yy. <tr: 2 Met re aie ae ge Sete ect ee arn Pachygaster 
Eyes of male separated; antenne in both sexes inserted at or near middle of 
head “nar ronan we eens el gel FEN Ree RN Rr, ane ea Set ae ee 8 
8. Scutellum much swollen, and with a distinct rim, the margin with a number 
of small wartlike protuberances; frons with a distinct incised median line 
froOMman FeMOrmOcelilus tonmic ler psi een ae eet ena Eupachygaster 
Scutellum slightly swollen, with a slightly defined rounded margin which is 
not armed with protuberances; frons without median incised line from 
halen ve Coreeiblhers anor wav So Wan Sk oncnonseeocceucenwob soc Neo pachygaster 
Berkshiria Johnson. 
This genus was erected for the reception of a single species, 
albistylum Johnson.t 
The locality of the species is Austen’s Brook, Chester; 
Mass., collected May 28, 1912, by C. W. Johnson. 
The following is a copy of the original description. 
‘““BERKSHIRIA gen. nov.”’ 
“Third joint of the antennz oblong, about double the length of 
the first and second taken together; third joint with five annuli, the 
basal one broader than the others; arista terminal, style-like, about as 
long as the entire antenna; front with two longitudinal ridges; trans- 
verse suture deeply impressed; scutellum large, rounded, with a broad 
depressed margin; third longitudinal vein without the anterior branch; 
ends of the terminal joints of the tarsi with bristle-like hairs. Type 
B. albistylum sp. nov.” 
*See under Exucynipimor pha. 
Psyche, Vol. 22, 1914, p. 158. 
