1920.] 



41- 



Oviparous Female. — This resembles the viviparous female except that the 

 hind tibiae have sensoria which talte the shape of the fipfure 8. Deliiiiercio 

 tioures similar sensoria for Sipha schoutedeni (Iledia, ii, 1904, Tav. xiii, fig. 6), 

 but the surroundings polygonal area is absent in A. serrulatus. 



"On grasses, England." 



Redescribed from numerous specimens, both viviparous and ovi- 

 parous. Alate 9 unknown. 



I have placed Theobald's Sipha paradoxa tentatively as a synonym 

 of this species. It certainly belongs to this genus, and I can see no 

 distinctions upon which to base a distinct species. The degree of sejmra- 

 tion of the abdominal segments varies. The exact lengths of the thoracic 

 segments are difficult to obtain unless care is taken in mounting. This 

 may account for the discrepancies in the measurements of the thoracic 

 segments in Sipha paradoxa and A. serrulatus. 



A. hrevicornis, sp. n. 



Apterous Viviparous Female. — Elongated, linear, rugose, S])inose. Spines, 

 except those on front of head and apical segment which are of the usual shape, 

 sputhulate-truncate, serrated at tip, rising from well-marked bjisea. Anteinnte 

 6-segmented, short, stumpy, reaching to about the middle of the protlwra.v ; 



Fig. 2. — Atheroides breviconiis, sp. n. Showing head, antenna, and characteristic 



spines. 



segment I \ longer than broad, II just over half the length of I, III a very 

 little longer than I, IV a very little shorter than II, V a little longer than III, 

 the spur about half the length of the basal part, with 3 short spines at tip. 

 Primary sensorium on V compound. Proportions of segments, 22, 14, 23, 12 

 (16-f 8). Bead with 1 median and 2 lateral protuberances, the lateral with 

 2 strong spines, dilated spines numerous on rest of head, whose length is about 

 § breadth. Frothora.v not quite so long as head, mesothorax about f longer 

 than the prothora.v,metathurax about ^ the length of the mesothorax ; numerous 

 dilated spines on all 3 segments. Jiostruvi reaches mid coxae, stiletto-pointed, 

 1st abdominal seymeyit quite distinct, the next 6 segments distinguishable, apical 

 segment distinct. Dilated spines numerous all over dorsum. Cornicles mere 

 pores at anterior margin of oth segment. Apical seymcnt twice as broad 



K 



