ADDENDA 337 



disc of the thorax usually brownish, and a spot at the hind angle of the 

 elytra and a transverse band before the apex of the hind body blackish ; 

 sometimes entirely yellow, with the head only black ; antenna? with 

 joints 0-10 transverse, dark with light base ; thorax strongly transverse, 

 rather strongly rounded, but less so than in G. nana, with two shallow 

 rows of punctures on the disc, and two or three punctures on the out- 

 side of each of these ; elytra longer than the thorax, very finely and 

 sparingly punctured, more thickly at the posterior angles; in the male 

 the penultimate dorsal segment is furnished with six small longitudinal 

 tubercles or carina?, and the last terminates in two long narrow pro- 

 cesses with a considerable space between these. L. IJ-lf mm. 



Bei'kshire and Hampshire (Joy) ; near Cardifi' (Tomlin) ; West- 

 morland (Day) ; probably widely distributed. 



The females are hard to distinguish from those of G. Icevipennis, Kr., 

 but the male characters are quite distinct from those of the latter 

 species, in which the last ventral segment is only slightly notched. 



G. ConvexicoUis, Joy (Ent. Mo. Mag. xlviii (2 Ser. xxiii) 

 1912, 149. Fig 12, p. 150). Broad, pitchy black, elytra, except 

 postero-external angles, rather obscurely yellowish ; first two segments 

 of hind body sometimes pitchy red ; antennfe yellow, fuscous at apex ; 

 legs yellow. Penultimate joints of antenna? distinctly transverse ; thorax 

 strongly transverse, more convex than in any of its allies, with a more 

 or less distinct row of punctures on each side of disc, or only one 

 large punctui-e on each side near base, sides impunctate, elytra transverse; 

 alutaceous, diffusely but distinctly and rather deeply punctured at the 

 postero-external angles, impunctate in scutellary region ; hind body 

 alutaceous, finely and rather closely punctured ; male with the penulti- 

 mate dorsal segment of hind body furnished with four small round 

 tubercles near posterior margin, the last terminating in two sharp teeth 

 separated by a considerable interval. L. 1|-1| mm. 



Occurring in marshy places, like its nearest ally G. lucidula, Theale 

 and Thatcham, Berks, three males in fiood rubbish (Joy) ; Yarnton 

 near Oxford, among wet dead sticks in a swamp (Walker). 



Dr. Joy gives good figures of the last dorsal segments of the hind 

 body in all the British species (I.e., p. 150), which should be consulted 

 by all students of the genus. 



Lathrobium ripicola, Czwalina (Deutsch. Ent. Zeits. 1888, 344 

 {boreale Muls. et Bey. Pederiens. 39)). Mr. Newbery (Ent. Mo. Mag. 

 xlviii (2 Ser. xxiii), 1912, 125), points out that this is the insect stand- 

 ing in our collection as L. horeale, Hoch., a name which has been dropped 

 altogether, as no insect with the male characters given by Hochhuth 

 appears to be in existence. From L. Icuvlpenne, Heer, which it closely 

 resembles, it may be known by its larger size, red coxse, the finer and 

 closer punctuation of the head, and especially by the male characters ; 

 in this sex the penultimate ventral segment of the hind body has a row 

 of converging black hairs on each side, which are absent in L. kevijjenne ; 

 from L. geminum, Kr., and L. elongatum, L., it may be known by its 



Y 



