MYRMECINA. 75 



1 f Apterous 2 



X Winged - 3 



2 / The two- joints of the pedicel very large, aspect immature 



| Anergates Forel. 



(1) 'I The two joints of the pedicel not large, aspect normal - 



1 - Formicoxenus Mayr. 



3 f Antennae 10- jointed Tetramorium Mayr. 



(1) \ Antennae more than 10- jointed - 4 



4 f Fore wings with cubital cell half divided by a transverse nervure 

 -j Myrmica Latreille. 



(3) ( Fore wings otherwise - - 5 



5 f Mesonotum without Mayrian furrows Solenopsis Westwood. 



(4) \ Mesonotum with Mayrian furrows 6 



6 f Epinotum without teeth or tubercles Monomorium Mayr. 



(5) 1 Epinotum with teeth or tubercles - - 7 



7 / Wings very dark Myrmecina Curtis. 



(6) t Wings not very dark- - - 8 



8 / Frontal area distinct Stenamma Westwood. 



(7) I Frontal area not distinct - - Leptothorax Mayr. 



MYRMECINA Curtis. 



(ptpMt, ant). 



Type: Formica graminicola Latr. (=latreillei Curt.; Curt., 1829). 



The genus Myrmecina comprises very few species which range 

 over the Palaearctic and Indo -Malay an regions. 



Q Head somewhat square, widely but not deeply emarginate at the base, 

 posterior angles rounded ; clypeus short with two longitudinal carinae, and 

 two blunt teeth in front : mandibles broad, with two rather strong teeth 

 and a number of smaller ones, when closed a triangular free space is left 

 between them and the clypeus ; maxillary palpi four- join ted ; labial palpi 

 three- jointed ; antennae twelve- join ted, with a three- jointed club ; eyes 

 small, situated in front. Thorax short, broad in front, narrowed behind ; 

 epinotum furnished with two strong spines, preceded by two small blunt teeth. 

 Petiole quadrangular, longer than broad, the front part cut out and sloping 

 post-petiole subtrans verse and subquadrate ; gaster oval with very long first 

 segment ; sting very small. 



$ Very like the ^ ; head broader ; mandibles larger in proportion. Thorax: 

 epinotal spines more robust. Wings blackish ; fore-wings with one radial 

 and one cubital cell. 



cJ Head globose, much smaller proportionately than in the Q and $ ; 

 mandibles tridentate, narrow, hidden beneath the labrum ; antennae thirteen- 

 jointed ; scape about as long as the two succeeding joints of the antennae 

 taken together. Thorax high, with the Mayrian furrows on the mesonotum, 

 and impression in front of the scutellum, distinct and crenate, epinotum 

 bidentate. Wings as in the $. Pedicel and gaster much as in the ^. 



Original description [Curtis Brit. Entom. 6 265 (1829)] : 



" Type of the Genus. Myrmecina Latreillii Nob. 



Myrmecina Nobis. 



Antennae inserted in the middle of the face, remote, longer than the head 

 and thorax, geniculated, hairy ; 13-jointed, basal joint short, but twice as 

 long as the second which is subglobose, the third and following oblong, those 



