254 



ALLOTRIA CEASSA. 



23. ALLOTEIA PERPLEXA. 

 PI. XIV, fig. 4. 



Allotria perplexa, Cam., Mem. Lit. and Phil. Soc. Man. (4), ii, 

 59. 



Black ; joints one to five of the antennas and legs testaceous, the 

 femora broadly black or infuscated in the middle ; wings hyaline, the 

 nervures pale fuscous. Antennae as long as the body, distinctly thickened 

 towards the apex ; the third joint one-fourth longer than the fourth ; 

 the last one-half longer than the penultimate. Radial cellule moderate, 

 broad, the first abscissa half the length of the second, which is a little 

 more than twice the length of the third ; the third abscissa slightly 

 curved ; the hair on median segment and base of abdomen very dense. 



The c? has the antennae filiform, longer than the body, the third 

 joint longer than the fourth, curved. 



Length 1 mm. 



There are two described species with darkened 

 femora and testaceous tibise and tarsi, as in perplexa 

 and crassa, namely, A. aperta (Germ. Zeits., iii, p. 353) 

 and A.fuscipes, Thorns. (Oef.,xviii, 410) ; but both differ 

 from perplexa and crassa in having the antennae shorter, 

 fuscipes having them scarcely longer than the thorax, 

 and aperta almost shorter than the thorax. 



Common. Bonar Bridge, Sutherlandshire ; Clydes- 

 dale. 



24. ALLOTRIA CRASSA. 

 PL XIY, fig. 6. 



Allotria crassa, Cam., Mem. Lit. Phil. Man. (4), ii, 59. 



Black, the scape fuscous ; joints two to five of antennae, the apex of 

 femora and tibise more or less, and the tarsi, testaceous ; the remainder 

 of the legs fuscous ; wings hyaline, the nervures fuscous. Radial cellule 

 elongated, narrow ; the basal abscissa of the radius about one-third of 

 the length of the second ; cubitus short, obscure. Antennae as long as 

 the body, thickened towards the apex ; the third joint one-half longer 

 than the fourth, the last a little longer than the penultimate. 



What is probably the male has the antennas filiform, longer than the 

 body, the basal three joints pale testaceous, the others dark fuscous. 



Length 1 mm. 



A smaller species than perplexa ; the antennae are 

 shorter, the head inclines to piceous in colour, the 

 radial cellule is more elongated, and has the second 



