TERRESTRIAL FAMILIES nv IIEMirTERA-IIETEROPTERA 123 



The genitalia of two specimens from I'ritain were examined, one from Polzeath, Corn- 

 wall, the other from Kidw'elly, Carmarthen. The parameres in lateral view (Plate VIII, 

 fig. 14) are distinctly angulate dorsally, the angnlation not being emarginate, and the ven- 

 tral margin distinctly flanged. In dorsal view (Plate VIII, fig. 15) the angulate prominence 

 hardly projects over the inner margin of the base of the shaft. 



b. A'^. ericac cricac (Schill.). The typical subspecies of cricac is much narrower than 

 thymi, the corial margins less ampliate, though very slightly curved from the widest point 

 towards the membrane (Plate VIII, fig. 8). The genital segment is black and the corial 

 nerves infuscated, but the basal immaculate spot on the vertex is much more strongly devel- 

 oped and the antiapical apodeme bases of the pronotum are normally included in a straight 

 unbroken transverse band. Material from North America (North Haven, Conn.) appears to 

 differ in no respect from a S from Marburg, Germany, determined by Horvath and in the 

 Britisii Museum collection. 



The genitalia were studied in two specimens from North Haven. The dorsal angle of 

 the parameres is very prominent, setose, and distinctly emarginate, the ventral flange is 

 obsolete (Plate VIII, fig. 16). In dorsal view the angular prominence projects over the 

 inner margin of the base of the shaft (Plate VIII, fig. 17). 



c. A'^. e. obscuratus Horvath. I have been unable to examine an authenticated specimen 

 of this form. Horvath's (1899) description is as- follows: Articulo primo antennarum, 

 saepe etiam basi articuli secundi, femoribusque nigris, femoribus feminae interdum pallidis, 

 nigro-maculatis; pronoto posterius fusco, angulis posticis maculaque parva media postica 

 pallidioribus; hemelytris griseo-fuscibus, interstitiis vernarum corii f usconebulosis ; ventre 

 feminae magnam partem nigro ; statura sexuum conformi. c5 . 2. Long, 4^-4^ mill. 



Apart from its size the first male from Renka-le appears to agree with this form but its 

 smallness indicates a transition to cricac cn'cae. The genitalia are quite typical. 



A^. e. obscuratus was originally recorded from Turkestan, Siberia and China ; in 

 Ekblom's map it is indicated as co-occurring with the typical subspecies throughout its entire 

 Central Asiatic range, but it is clear from Horvath (1904) and Kiritshenko (1931a) that it 

 is the only form found in the Tian-shan and in the Pamirs so that it may justifial)ly be 

 given subspecific status. 



d. A^. c. groenlandicus (Zett). Lindroth (1931) synonymises this form with obscuratus. 

 In groenlandicus, however, the corial margin has a peculiar shape well marked in a series 

 of ? 9 in the British Museum collection and also in a 5 from Kugsuk, Godthaab Fjord, 

 West Greenland, collected by Major Hingston and kindly sent me by Professor G. D. H. 

 Carpenter of Oxford (Plate VIII, fig. 9). In N. e. ericac and in the Renka-le specimen, 

 discussed above under N. c. obscuratus, the corial margin is slightly and very gently rounded 

 from the straight basal part to the region of maximum dilatation, while in groenlandicus the 

 dilatation is more sudden so that in this region the corial margin appears almost obtusely 

 angulate. Moreover, in grociihnnlicus the ])ale purtion of the elytra is more transparent 

 than in the other forms so that when compared with obscuratus the color pattern of the 

 former shows much more contrast than that of the latter, likblom (1931) records the 

 Lapland form of cricac as obscuratus without description, and without indicating any Ice- 

 landic or Greenlandic records on his map. In the absence of specimens from this region it 



