70 
AMERICAN SPECIES OF AKADUS (iIEMIPTERA) 
o’ (fiR. :i31)). Fifth vontnil segment slightly longer than sixth; genital 
segment short, strongly (*onvcx; alxloinen hroadl^^ (^\al, eienate. Fcngth, 
S.o min. 
9 (fig. Ififa). Dorsal genital segment twice as wide as long, the posterior 
margin very obtusely angnlate as a whole; abdomen narrowly oval, moder- 
ately produced jiosteriorly, the margins slightly notched. Length, 10 mm. 
Type specimen ( Alaryland) in the Uhler collection, United 
States National Altisenm, No. 24080, lectotype. 
This sjtecies, which has often been misunderstood by students 
and sometimes determined as acidiis, is not found west of the 
Rocky Mountains, as defined here. It is readily recognized by 
its uniform coloration, long and regularly enlarged second an- 
tennal segment, flattened pronotum, feelile carinae, etc., accord- 
ing to the criteria given in the table of species. The original 
series, from which Uhler drew up his description, contains two 
s])ecies, one of which, occurring in the Pacific Coast region, has 
been described by Van Duzee^o as blaisdelli. In selecting single 
type specimens of Uhler’s species, I have as a rule chosen the one 
which liears Uhler’s laliel with the specific name, Init in this case 
it has seemed advisable to depart from this prineijile in order to 
avoid the necessity of changing names. A Alaryland examiile, 
mentioiK'd in connection with the original description, has there- 
fore beim denominated the tyjie of inornatus (although it is un- 
foi1imat(‘ly somewhat imperfect). The specimen which bears 
Uhler’s label is witlumt definite locality and has an abnormal 
pi-onotum, but it is c('rtainly an example of the western blais- 
(Iclli. I can see no useful ])urpose to be served in selecting this 
spi'cinu'n, and much against such a course; Uhler did not name 
definite type's and doubtless it is merely the first specimen, as 
his ari-angenu'nt originally stood, which bears the label. 
34. Aradus (Aradusi blaisdelli Van Duzoo (Plato IV, fig. 31.) 
I'.rid. Ai'ddiis hidisdilli \'aii l)uzo(', Proc. ('alifoniia Acad. Soi., (4), ix, ]>. 
add. 
IHslrihiiliod . ~-\Uur\si\ ('olpmiua; N’ornon, V, :tl, 1017 (M. ll.Piihmami). 
\\ ASiii.N'(iTo.\ : I’n'ssy’s, Wiaiass V. (W. T.), ^dl, (>, 1SS2 (S. lloiishaw). 
.Montaxa: Poimcr, \’, 2(1, lOOl; Floroma', \ 1, 1(1, P.M2; Lo Ijd, \ 1, 10, 1012. 
N'kvada. ( 'ami'ou.ma: 1 hint iiigt am Lak(>, Fn'sno ( 'ounty, 7000 to SOOO ft ., 
\11, 7 to 22, 1010 (Iv P. \ an l)uz(>o); Lake 4'alio(', t ill, 10, ISOl; Mohave 
Desert, llolcoirib \ .alk'V (.Ari/,.?) ; ( )ak (Irovi'. 
' Pio<-. (';d. .\(ad. Sci., (1), IX, p. I!;!;!, (1020). 
