82 R. W. CROSSKEY 



closure or non-closure of the posteroventral declivity of the thorax not previously 

 known in the germariochaetines. 



Finally here a point needs noting about Mesnil's (19736 : 1220) redescription 

 of Germariochaeta clavata. Mesnil describes the male sex for the first time and 

 cites the male specimen he saw from Tientsin as 'Paratypus' but the specimen 

 does not in fact have paratype status even though it bears Villeneuve's label 'para- 

 typ.'. The original description was based on a single female specimen as Villeneuve 

 (1937a : 7) clearly showed by the statement 'une $ unique'. 



Key to Genera of GERMARIOCHAETINI 



1 Sternites widely exposed. Palpi absent. Arista with both basal segments much 

 elongated (Text-fig. 39). [Species with the abdomen bicolorous, orange-red on 

 basal half and dark brown to blackish on apical half, and with T5 entirely shining 

 non-pollinose.] GERMARIOCHAETA Villeneuve 



- Sternites concealed. Palpi present. Arista with first basal segment short and 



second segment slightly to much elongated. [Species with abdomen unicolorous 

 blackish or dark brown in ground colour, and with T5 extensively pollinose like the 

 preceding segments.] LOPHOSIOSOMA Mesnil 



Key to Species of LOPHOSIOSOMA Mesnil 



[Note. Only two specimens are known of L. bicovnis and one each of the other species. 

 Some characters might not hold when more material is known.] 



1 Scutellum with the posterior corners produced into a pair of thumb-like tubercles 



(that carry the single pair of scutellar setae) (Text-fig. j$). One notopleural seta. 

 Hypopleuron totally bare. [Formosa] ..... bicornis Mesnil 



- Scutellum with the posterior corners not produced into long tubercles (the setae 



inserted in pores that are only weakly raised). Two notopleural setae. Hypo- 

 pleuron with some hypopleural setae or hairs ....... 2 



2 No sternopleural seta. Posteroventral declivity of the thorax with a fully sclerotized 



bridge or with lateral sclerotizations that virtually meet in the mid-line ('closed'). 

 Scutellum without any setae additional to the main pair. [India] ... 3 



- One sternopleural seta. Posteroventral declivity of the thorax widely membranous 



medially ('open'). Scutellum with a pair of small secondary setae differentiated 



in front of the main pair. [Java] ....... javanum sp. n. 



3 Legs uniformly black-brown. Wings with an indefinite large smoky brown area 



preapically. Smaller size, length about 7 mm .... obliteratum sp. n. 



- Legs with bright orange femora that contrast with brown or black tibiae and tarsi. 



Wings rather evenly suffused with brown colouring, narrowly greyish hyaline 

 against the hind margin. Larger size, length about 10 mm. . rufqfemoratum sp. n. 



Descriptions of New Species of LOPHOSIOSOMA Mesnil 

 Lophosiosoma javanum sp. n. 



Ocellar setae absent. Humeral callus with a small inner seta clearly differentiated in addition 

 to the strong outer seta. Two notopleural setae. Prostigmatic seta small but well differentiated. 

 Sternopleural seta present. Scutellum without paired tubercles, with two pairs of setae (small 

 supernumerary pair clearly differentiated in front of the main pair). Hypopleuron with two 



